Camel hump heads

SBC Head shoot out Part 2Heres one for the Old school boys!Stock Vortec Heads VS Stock Camel Humps Vs Ported 2.02 Camel Humps!Very good info, Real flow data!...

Are you saying that the performance of my engine will not be as good by using 202/160 camel heads on the 283 bored 80 over. Im just looking to get about 300-350hp, that will be good enough for me. 84 Z28 Camaro Convertible 283 bored 80 over, 202/160camel hump heads, Edelbrock RPM Maniford, Holley 670 Avenger Carb, …The most common heads sought by engine builders are ones identified variously as the "Camel Back," "Double Hump" or "Humper" heads used on a range of passenger cars and performance vehicles. Background. The small-block engine was manufactured by General Motors for Chevrolet and other GM vehicles from 1955 to 2002. It featured the following ...041s ARE double-humps. Some of the casting numbers you see the most are 461 (no bolt holes), 462, 492, 186, 041, 041X, 291 (no bolt holes), 292 (over-the-counter GM race head) Those used to be the heads we all ran, for years and years, back before CNC casting made possible the whole aftermarket head industry as we know it.That wrecking yard I visited has got various types of those camel hump heads lying around. Ported, stock, with valve seats installed and without, small and big valves, screw and pressed studs, complete and bare, some cracked, some not... They cost less than $300 a pair. That may sound like cheap, but I wouldn´t install any of those …1094 posts · Joined 2008. #1 · Dec 4, 2015. I have a set of 1965 camel hump heads that have been completely redone with hardened seats and Manley stainless valves, screw in studs, guide plates. Comp cam springs. These were built at the machine shop and have been on my engine since it was new 2 yrs ago and only have 3256 miles on the motor.“Fuelie” cylinder heads or “camel hump” heads were very popular in the 1960s but were not limited to a single casting number. There are at least six different casting numbers that are identified under the …SMALL BLOCK CHEVY Camel Hump Heads 1965-1967 Part #3782461 Pair. Opens in a new window or tab. Pre-Owned. $1,200.00. penzgemz (24) 100%. Buy It Now. Free local pickup.Based on the iconic “double-hump” or “camel-back” (fuelie) cylinder heads of the ‘60s and early ‘70s—including the famed 461 Fuelie heads—the DHC 175 castings are modern aluminum versions with straight spark-plug locations and improved 60cc combustion chambers.

If they are the early camel backs then they won't have the end holes for the accessory attachment. If they are the LT-1/Z28 heads they will. The early heads had 1.94 or 2.02 intake valves. The later heads only had 2.02 I believe. Both should have a nominal combustion chamber of 64cc. I personally prefer the 64cc head to the later 76cc smog …Oct 1, 2006 · The double hump or "camel hump" casting marks can be found on a variety of small-block iron heads and designate a high-performance casting. Many heads with the double-hump mark were installed on ... Fully ported and assembled Chevy Camel hump 461 heads. Sbc Chevy heads. Nova, Chevelle, Corvette, Camaro. Old school Iron, Muscle car cylinder heads. Bad to ...Free Shipping - Trick Flow® DHC™ 175 Cylinder Heads for Small Block Chevrolet with qualifying orders of $109. Shop Cylinder Heads at Summit Racing. $5 Off Your $100 Mobile App Purchase - Get the App. ... 291,461,462 "double hump" or "camel back" castings that customers want. To keep with the vintage design, the heads are available with 69 ...041s ARE double-humps. Some of the casting numbers you see the most are 461 (no bolt holes), 462, 492, 186, 041, 041X, 291 (no bolt holes), 292 (over-the-counter GM race head) Those used to be the heads we all ran, for years and years, back before CNC casting made possible the whole aftermarket head industry as we know it.

Features like fast-burn combustion chambers, high-velocity ports, large diameter valve springs, and positive stop valve seals bring the vaunted camel hump heads into the 21st Century. Save yourself the hassles of hunting down original GM 3782461, 3782461X or 3890462 castings, only to find out they can't be saved.The actual CFM flow numbers would depend on if any work was done to the heads, and the quality of the valve job I did read one test on flow #'s for a 461 (stock, untouched), the #'s were as follows: .050" 1-38.9, E-20.9Flow characteristics, on double hump heads are very limited, even with drastic porting they wont flow much past .550 lift with big inch sbc. Also if you run much more than 350-360 ci your really limiting the power potential, on 283-327 they run awesome and if are in good shape can be freshened up reasonable priced.Originally sold bare, so valve sizes are dependent on machining. All 400ci small-blocks utilize Siamese cylinder walls. This design caused the cooling system to develop hot spots and that is why the 400 heads have steam holes. 25534351C: 2004 Bow Tie, cast-iron, Vortec, 175cc intake ports, 65cc exhaust ports, 2.02/1.55-inch valves.

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General Motors identifies its small-block Chevy cylinder heads with both casting numbers and casting marks. "Double-hump" heads were found on many of its high-performance engines in the 1960s and early 1970s. They were manufactured with larger intake and exhaust port volumes and valves for the period, and engines equipped with them had output ...Step back in time with our modern reproduction of the iconic Chevy 461 double hump cylinder heads, now cast in lightweight aluminum! Also known as "fuelie" heads, the …Customers highly recommend the SBC 461 CAMEL HUMP Aluminum heads, lauding their superior power increase compared to the factory …Head circumference is a measurement of a child's head around its largest area. It measures the distance from above the eyebrows and ears and around the back of the head. Head circu...

There were many castings that ended in 462, but had different overall numbers. For example, in the mid sixtys, there were heads with the same casting numbers ( ending in 462) but had either 1.94 intakes or 2.02 depending on application. Also I know from experience that many 1.94 heads were opened to 2.02. joel, Jan 25, 2020.Features like fast-burn combustion chambers, high-velocity ports, large diameter valve springs, and positive stop valve seals bring the vaunted camel hump heads into the 21st Century. Save yourself the hassles of hunting down original GM 3782461, 3782461X or 3890462 castings, only to find out they can't be saved.Self leveling underlayment, also known as self leveling compound or floor leveler, is used to level out shallow dips and humps in a subfloor, prior to Expert Advice On Improving Yo...Doesn't the double hump head family run outta steam above about a .450" to .500" lift b/c they weren't meant to run much above .447", (-151 cam), or .456", (-346 cam)? ... Deshrouding or unshrouding refers to opening up the heads combustion chamber wall near the intake valve. If you upgrade the heds to 2.02 valves from 1.94s and don't do this ...3991492. Jump to Latest Follow. 30K views 10 replies 7 participants last post by 2drpostL79 Aug 23, 2009. G. gregmontgomery Discussion starter. 203 posts · Joined 1999. #1 · May 18, 2009. can anyone give any info. on these heads .3991492 is the numbers are these good performance heads.thanks. Like.My first attempts at jogging were met by my body feeling like it was going to fall apart. Jogging seems as easy as lacing up and taking off on the streets, but here's what I learne...Look for last 3 numbers, example 461, Casting number 3767462 identifies Camel Back heads on 327 engines in 1962 to 1967 GM models. Number 3782461 is found on heads on the 1964 to 1967 models equipped with the 327. Number 3917291 can be found on the 302, 327 and 350 engines in 1967 to 1969 models. Number 3927186 is …There are decent heats, rather a return to the old dual quench, camel hump head. Not as power making as the L31 Vortec head of 1996-2002 but a pretty decent head for seekers of top end horsepower. What you need is the engine builds and partial VIN codes off the right front of the block between the head and the coolant pump.But this head uses a smaller intake port to impart more lower end torque that goes with the lower gas consumption RPMs. This came at the cost of top end power, so these heads just aren't competitive with the Camel Humps unless they are professionally ported. The L31 Vortec comes out of the LT-1 and 4 reverse coolant heads of the early …Sep 6, 2005 · The very FIRST double hump, camel hump, FI, "fuelie" (whatever you want to call it) head was installed on the 1961 315hp/283 Corvette fuel injected engine. THAT WAS THE ONLY ENGINE (at that time) TO GET THE HEADS WITH THE NOW FAMOUS 2 HUMPS on the ends of the head. SOOOOOOOOOOOOOOOOO, guess where the "fuelie" term originated. Camel Group News: This is the News-site for the company Camel Group on Markets Insider Indices Commodities Currencies StocksCamel back, double hump,fuelie heads, are all names for 461,462 & 291 head castings, and I think they WILL work on a 305. If I'm not mistaken, they would lower your compression ratio, though. I think 305 heads have 58CC combustion chambers, and the above named heads have 62-65 CC combustion chambers. I woud imagine that the …

Are you saying that the performance of my engine will not be as good by using 202/160 camel heads on the 283 bored 80 over. Im just looking to get about 300-350hp, that will be good enough for me. 84 Z28 Camaro Convertible 283 bored 80 over, 202/160camel hump heads, Edelbrock RPM Maniford, Holley 670 Avenger Carb, …

Are you saying that the performance of my engine will not be as good by using 202/160 camel heads on the 283 bored 80 over. Im just looking to get about 300-350hp, that will be good enough for me. 84 Z28 Camaro Convertible 283 bored 80 over, 202/160camel hump heads, Edelbrock RPM Maniford, Holley 670 Avenger Carb, …back in the early 80's my best friend had a 79 Z-28, we put a sbc with camel non accesory holed heads on his car, we found a bracket from somewhere that worked fine. Don't ask me what the bracket came off of, we didn't know at the time. 1968 Camaro NHRA/IHRA SS/C 'Super Stocker' 396/Jerico. 1968 Street/Strip Camaro 350 w/PG.GSTP Alternator Bracket Kit Compatible with Small Block Chevy SWP SBC 283 305 327 350 Short Water Pump Drivers Side Black. dummy. Camoo SBC Alternator Bracket Adjustable Kit for Chevy SBC 305 327 350 383 5.0L 5.7L V8 Eight Cylinder Long Water Pump. dummy. Chrome Low Mount Alternator Bracket Compatible for SBC SB …stinger460. lets not scare the man. 400 sbc's can be cooled and not over heat on the street. here's how. drill steam holes in those heads if you really plan on using them. also while having the heads off time to do some plumbing. on the block between the two center bore there is a plug in the water jacket on each side. remove them, then coming ...I started a build of a SJ 327 block with an older aftermarket 3.48” SJ crank. I was going to run it in my 57 with ported aluminum speedway motors camel hump heads, modified to take a staggered valve cover, and a heavily worked factory intake. I was hoping to squeak into the 12s with it.Rebuilding my old and tired 327 Camel Hump Heads from 1967. Cleaned, lapped and refreshed with new seals and retainers.#1967impala #chevroletimpala #chevyim...If they are the early camel backs then they won't have the end holes for the accessory attachment. If they are the LT-1/Z28 heads they will. The early heads had 1.94 or 2.02 intake valves. The later heads only had 2.02 I believe. Both should have a nominal combustion chamber of 64cc. I personally prefer the 64cc head to the later 76cc smog …202 camel hump heads. I was really leaning toward a set of aluminum heads, but my cousin called and said he had a set of 202 camel hump heads off his 327. He has roller rockers to go with them. The 327 is dead and now he has a LT-1 which he is putting into his 67 camaro. I currently have a mainly stock 350 with 882 76cc heads (i …As the decade wound down, the camel hump heads continued to endure with subtle tweaks for power improvements. After 1969 these were made with accessory bolt holes and 64cc combustion chambers. Like the previous camel hump heads, casting number 3927186 was offered in both small and large valve packages.

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Oct 20, 2003. 3,212. Sitting in my command bunker waiting for the zombi. As stated, the value depends on the demand from someone who wants what you have. Just FYI, the DZ engine is 69 Z28 only, so would not be found in a 67. the F17 on the heads is likely the casting date - June 1, 1967. This is kind of late in the 67 model year production, … There are a lot of castings to choose from when running the Chevy Double Hump heads. In this video we discuss what is the best casting to start with for you... One-humped and two-humped camels are two entirely different species. The two-humped species is the Bactrian camel, while the one-humped species is the dromedary. Bactrian camels ar...I've recently hopped over the initial hump of getting myself exercising regularly, but I'm having trouble finding a balance between pushing myself too hard and not...they have the camel hump are they like the 186's ? thanks for the help a buddy has a set sitting in the corner of the garage and he wants $150 for them. just want some info on them first. ... 3973370 heads were used on 69/70 Chev or pontiac 350/300HP engines, at least in Canada they were. Basically same head as the 186.Camel Hump head porting and setup. by postal123 » Sun Jun 11, 2023 5:24 pm. Gents, I'm just a hobbyist and this is my 2nd thread here and 2nd attempt at head porting. I bought a '65 K10 with 8k "rebuilt" 357 SBC. Flat top 4-eyebrow pistons, HFT cam measured 252/262, 202/214 109 ICL and 114 LSA. 492 angle plug heads, performer intake with 600 ...Aug 19, 2007. 43. hamilton, ontario. hi i picked up a set a double hump heads the casting number is 3890462 for free but need to be reconditioned. are these any good and could i get somke help with info like what they were on and sizes also are they worth anything? thanks for any help, chad_48. Oct 17, 2007. #2.Chevy Corvette 3782461 Cylinder Heads SBC Camel Double Hump Ported Fuelie. Opens in a new window or tab. Fresh vintage Crane Cams Super Port Flow Fireball heads. Remanufactured. $2,463.67. nextgenmotorsports (427) 100%. or Best Offer +$137.55 shipping. 42 watchers.Re: Camel Hump Heads, adding accessory bolt holes 09-21-06 03:47 AM - Post# 1005698 In response to impalex I really don't think drilling a set of early heads would be a good idea. The later drilled/tapped heads have a totally different casting design on each end. I have an early set of heads like yours on my El Camino.Erik Beckett Discussion starter. 710 posts · Joined 2001. #1 · Jul 11, 2004. I need to install some new plugs in my 327 but I am not sure what to go with. I have the 462 camel hump heads and right now there are NGK XR5's in that are a grey color on the porcelin. This the same set that came with the car when I bought it so I need to change ... ….

item 8 OEM GM 3782461 Cylinder Heads Small Block Chevy Camel Hump 1964 2.02 1.60 Fuelie OEM GM 3782461 Cylinder Heads Small Block Chevy Camel Hump 1964 2.02 1.60 Fuelie $895.00 +$88.85 shippingAccessory holes in the heads did not come about until 1969. This was also the first year of the long style water pump. If you keep everything stock on your 1967, it is all stock parts for a '67 with the "short" water pump. Many parts houses can set you up with what you need. 69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI ...The Rochester mechanical fuel injection option was first offered on the 283 cubic inch rated at 283 horsepower. This was the first engine to offer one horsepower per cubic inch. This is why the double hump, or camel hump heads are called fuelie heads. Today we expect 1.5 horsepower per cubic inch out of the small block; so we have …A group of camels is referred to as a caravan, flock, train or herd. The Arabian camel travels up to 100 miles without drinking. It stores 80 pounds of fat in its hump, converting ...The double hump or "camel hump" casting marks can be found on a variety of small-block iron heads and designate a high-performance casting. Many heads with …The Vortec heads do flow better than the camel backs heads. The only thing is that with the added cost of an intake and valve covers, the swap can get to the cost of a set of Dart or RHS heads. RHS also offers their Pro-torker line of heads that are the same 170cc intake runners, but with the old bolt patterns !I'm sure you will get a more technical response for this but "camel hump" heads are named primaraly for the embossed shape in front of the head where your accessories. would bolt up too. Back in the day they were sought after hi -po hp. heads that were. closed chambered large valve small block heads.There were many castings that ended in 462, but had different overall numbers. For example, in the mid sixtys, there were heads with the same casting numbers ( ending in 462) but had either 1.94 intakes or 2.02 depending on application. Also I know from experience that many 1.94 heads were opened to 2.02. joel, Jan 25, 2020.General Motors identifies its small-block Chevy cylinder heads with both casting numbers and casting marks. "Double-hump" heads were found on many of its high-performance engines in the 1960s and early 1970s. They were manufactured with larger intake and exhaust port volumes and valves for the period, and engines equipped with them had output ...In this video, Joe and Wyatt discuss the features that bring the vaunted camel hump heads into the 21st Century. Speedway Tech Talk - Aluminum Cylinder Heads for 348-409 Chevys. Read More. Tim shows off our aluminum cylinder heads for 348-409 Chevys. Chevy 454 Big Block Budget Build: Recipes for 400-600 HP. Camel hump heads, They actually ran very well. The 327-300 engine used the double hump heads, with larger 1.94" and 1.5" valve size, larger port intake manifold with larger Carter AFB carb, and larger dump ram's horn exhaust manifolds. The basic shortblocks of the two 327s were basically the same. More than likely your block number is 870., Compatible with Camel Hump/Fuelie Heads Includes Grade 8 Hardware Pump Rotation : Standard (Not Included) Reverse Rotation (Included) Reverse Rotation (Included) Standard (Not Included) Standard (Not Included) Product information . Technical Details. Manufacturer ‎CVF Racing ..., As already mentioned by others, there are better heads available now. Certainly Chevy's later performance heads are better, but the BEST performance SB heads are aftermarket versions. The first version of the double hump heads was the 461, which was introduced in 1961 on the 315hp/283 fuel injected (ONLY) Corvette engine., The actual CFM flow numbers would depend on if any work was done to the heads, and the quality of the valve job I did read one test on flow #'s for a 461 (stock, untouched), the #'s were as follows: .050" 1-38.9, E-20.9, Unless your doing a restoration that requires camel humps your better off with aftermarket heads. Even a set of mildly worked vortec heads are better than camel humps. I would go with the Dart heads. You'll be much happier. Heads have advanced incredibly since the 60's. 71 Nova - LQ4/4L80E, 12 bolt posi 4.11 rear - SOLD., Rebuilding my old and tired 327 Camel Hump Heads from 1967. Cleaned, lapped and refreshed with new seals and retainers.#1967impala #chevroletimpala #chevyim..., These heads will also interchange with other camel hump heads with casting numbers 461, 461X, 462, 291, 292, 186, 041, 370, & 492. These heads will fit 265, 283, 302, 305, 307, 327, 350, & 400 small block Chevy engines from 1955 to 1986 with no modifications (steam holes will need to be drilled for a 400) and 1987-1999 with correct gen 1 intake ..., Compatible with Camel Hump/Fuelie Heads Includes Grade 8 Hardware Pump Rotation : Standard (Not Included) Reverse Rotation (Included) Reverse Rotation (Included) Standard (Not Included) Standard (Not Included) Product information . Technical Details. Manufacturer ‎CVF Racing ..., Using the cam specs (specifically the intake valve closing angle) and your engine’s static compression ratio, you can determine Dynamic Compression Ratio (DCR). However, if a high static compression number, such as 10.5:1, is required to get a decent DCR number (like 7.8:1), you will more than likely end up with pre-ignition at RPMs above ..., 0. 2.125/1.625. Gen III LS1 "GTZ" aluminum 38cc angle plug. 12480011. SB2.2 head 48 ~ 54 CC angle plug 284 CC intake runner Bare heads. 12480034. 2.02/1.60. Bowtie Phase III 64cc Angle plug 184 cc intake runner. 12506450., How Fuelie Cylinder Heads Launched SBC Performance. By Mike Magda August 12, 2017. News that Trick Flow will re-engineer the classic small-block Chevy “double-hump” or “camel-back” cylinder heads in cast aluminum is reviving interest in the original Gen I platform, and is stirring up memories of great engines that were built with those ..., DHC 175 heads are made from premium grade A356-T61 aluminum and have the exterior styling and straight spark plug holes that deliver the nostalgic appearance customers want. On the inside, 60cc CNC-profiled combustion chambers with blended bowl machining under the valves and small cross-section intake runners promote low-RPM torque increases ... , stinger460. lets not scare the man. 400 sbc's can be cooled and not over heat on the street. here's how. drill steam holes in those heads if you really plan on using them. also while having the heads off time to do some plumbing. on the block between the two center bore there is a plug in the water jacket on each side. remove them, then coming ..., Mar 9, 2003 · Camel Hump Heads Long ago, and I mean long ago, I knew all this stuff by memory. I believe the first camel hump head was on the 250HP or 275HP 327. Those heads had the 1.94 intakes. The 2.02's must have been on the 350HP or 365HP, and of course the Fuelies. I used to read Popular Hot Rod religiously and they had a project called Project X, a ... , Re: 350 block 461 camel hump heads 11-25-04 06:02 AM - Post# 560210 In response to raws67 Hi..those heads are probably closer to 64 cc. This where it gets sticky..I was doing the same thing. I ended up with over a grand into a set of 186 heads. If you have the heads surfaced,new seats,new valves and springs and keepers, you will be over 350 …, For instance, the camel hump symbol (also called double hump) can be found on 461, 461X, 462, and 291 casting heads. The 492, 292, and 186 heads have a slightly different looking camel hump. These heads may have come with 1.94/1.5-inch valves or they might have been made with 2.02/1.6-inch valves. , The “double hump” or “fuelie” heads have been around since the 1960’s. They are still used in a variety of applications. We have a good supply of used ‘186 & ‘492 heads available with everything from “ Undercover Porting ” to CNC Sportsman Porting. Stock “double hump” heads flow 202 cfm intake and 141 cfm on the exhaust., How Fuelie Cylinder Heads Launched SBC Performance. By Mike Magda August 12, 2017. News that Trick Flow will re-engineer the classic small-block Chevy “double-hump” or “camel-back” cylinder heads in cast aluminum is reviving interest in the original Gen I platform, and is stirring up memories of great engines that were built with those ..., If you find a set that are ready to go and need no work, they are a good head. With port work, 2.02/5 & 1.60 pro flow valves they can be a great head. Now if you do this and the cost of all the machine work and parts. A STK Vortec head for under 600.00 a pair will greatly out perform these heads., 0. 2.125/1.625. Gen III LS1 "GTZ" aluminum 38cc angle plug. 12480011. SB2.2 head 48 ~ 54 CC angle plug 284 CC intake runner Bare heads. 12480034. 2.02/1.60. Bowtie Phase III 64cc Angle plug 184 cc intake runner. 12506450., Head and face reconstruction is surgery to repair or reshape deformities of the head and face (craniofacial). Head and face reconstruction is surgery to repair or reshape deformiti..., Based on the iconic “double-hump” or “camel-back” (fuelie) cylinder heads of the ‘60s and early ‘70s—including the famed 461 Fuelie heads—the DHC 175 castings are modern aluminum versions with …, 3991492. Jump to Latest Follow. 30K views 10 replies 7 participants last post by 2drpostL79 Aug 23, 2009. G. gregmontgomery Discussion starter. 203 posts · Joined 1999. #1 · May 18, 2009. can anyone give any info. on these heads .3991492 is the numbers are these good performance heads.thanks. Like., According to my information, 461X was the best of all the camel hump heads but are very rare. Next comes the 492 castings, next the 461, then 186, then 041s which are not camel humps but have the same design. ... As already mentioned, it is generally considered that the better choice of the EARLIER double hump heads are the 61-63 …, 041s ARE double-humps. Some of the casting numbers you see the most are 461 (no bolt holes), 462, 492, 186, 041, 041X, 291 (no bolt holes), 292 (over-the-counter GM race head) Those used to be the heads we all ran, for years and years, back before CNC casting made possible the whole aftermarket head industry as we know it., If you find a set that are ready to go and need no work, they are a good head. With port work, 2.02/5 & 1.60 pro flow valves they can be a great head. Now if you do this and the cost of all the machine work and parts. A STK Vortec head for under 600.00 a pair will greatly out perform these heads., Camel Hump Heads. « on: March 21, 2009, 12:18:00 AM ». I have a set of 1.94 Camel Hump heads from 1967 327 engine. I am thinking of getting these machined out to 2.02's and using them on a freshly built 350. I will be running a Holley 650cfm carb and an air gap intake with an additional 2" throttle body spacer., There's going to be a storm of deals and the market will not be able to handle it without taking the whole table lower....PVH Could jeans destroy the stock market's uptrend? Co..., There is a company out there that makes aluminum heads with the old double hump casting on the ends. Might be worth looking into. 1969 x-77 Z/28 orange/ white stripes, named by my daughter "Clementine ", M-22 close ratio, 4:10 12 bolt, CE 302. Hugger orange with white stripes., Learn how to draw a camel by starting with basic shapes and adding details. Get illustrated, step-by-step instructions in this article. Advertisement Camels live in d­eser­t climat..., item 7 OEM GM 3782461 Cylinder Heads Small Block Chevy Camel Hump 1964 2.02 1.60 Fuelie OEM GM 3782461 Cylinder Heads Small Block Chevy Camel Hump 1964 2.02 1.60 Fuelie $895.00 +$88.85 shipping, A fabricated panic over so-called "camel flu" is being used to spread racist stereotypes The UK Health Security Agency (HSA) alerted doctors across the UK that soccer fans coming b..., Step back in time with our modern reproduction of the iconic Chevy 461 double hump cylinder heads, now cast in lightweight aluminum! Also …