SKU: 11255242965

Cometic Chevy BB Gen IV 396/402/427/454 H/G 4.320 inch Bore .040 inch MLS Head Gasket

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Description

Cometic Chevy BB Gen IV 396/402/427/454 H/G 4.320 inch Bore .040 inch MLS Head GasketComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 040". Cometic MLS (Multi Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two

Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0.040". Cometic MLS (Multi-Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two materials. MLS gaskets have increased strength because they are comprised of multiple layers of stainless steel; which also creates the ability to rebound and resist corrosion. The outer layers are embossed and coated on both sides with Viton (a flour elastomer rubber based material that is heat resistant to 250 C/ 482 F). Viton is designed to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes. The center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements.

This Part Fits:

Year Make Model Submodel
1965-1975 Chevrolet Bel Air Base
1965-1972 Chevrolet Biscayne Base
1973-1974 Chevrolet Blazer Base
1969-1972 Chevrolet Brookwood Base
1978-1980 Chevrolet C10 Big Ten
1975-1980 Chevrolet C10 Cheyenne
1975-1980 Chevrolet C10 Custom Deluxe
1975-1980 Chevrolet C10 Scottsdale
1975-1980 Chevrolet C10 Silverado
1968-1974 Chevrolet C10 Pickup Base
1968-1974 Chevrolet C10 Suburban Base
1975-1980 Chevrolet C10 Suburban Custom Deluxe
1975-1980 Chevrolet C10 Suburban Scottsdale
1975-1980 Chevrolet C10 Suburban Silverado
1990 Chevrolet C1500 454 SS
1990 Chevrolet C1500 Cheyenne
1990 Chevrolet C1500 Scottsdale
1990 Chevrolet C1500 Silverado
1990 Chevrolet C1500 WT
1975-1981 Chevrolet C20 Cheyenne
1981-1986 Chevrolet C20 Custom
1975-1980 Chevrolet C20 Custom Deluxe
1981 Chevrolet C20 Deluxe
1975-1986 Chevrolet C20 Scottsdale
1975-1986 Chevrolet C20 Silverado
1968-1974 Chevrolet C20 Pickup Base
1968-1974 Chevrolet C20 Suburban Base
1981-1986 Chevrolet C20 Suburban Custom
1975-1980 Chevrolet C20 Suburban Custom Deluxe
1981 Chevrolet C20 Suburban Deluxe
1975-1980,1982,1984-1986 Chevrolet C20 Suburban Scottsdale
1975-1977,1979-1980,1982-1986 Chevrolet C20 Suburban Silverado
1975-1981 Chevrolet C30 Cheyenne
1981-1986 Chevrolet C30 Custom
1975-1980 Chevrolet C30 Custom Deluxe
1981 Chevrolet C30 Deluxe
1975-1986 Chevrolet C30 Scottsdale
1975-1986 Chevrolet C30 Silverado
1968-1974 Chevrolet C30 Pickup Base
1988-1990 Chevrolet C3500 Cheyenne
1988-1990 Chevrolet C3500 Scottsdale
1988-1990 Chevrolet C3500 Silverado
1967,1969,1971-1972 Chevrolet Camaro Base
1967,1969 Chevrolet Camaro RS
1967-1972 Chevrolet Camaro SS
1972 Chevrolet Camaro Z28
1966-1972 Chevrolet Caprice Base
1973-1976 Chevrolet Caprice Classic
1976 Chevrolet Caprice Classic Estate
1976 Chevrolet Caprice Classic Landau
1975-1976 Chevrolet Caprice Classic Sport
1973-1974 Chevrolet Caprice Estate
1975 Chevrolet Caprice Estate Wagon
1965-1966,1968 Chevrolet Chevelle 300
1967-1969 Chevrolet Chevelle 300 Deluxe
1970-1972 Chevrolet Chevelle Base
1967-1972 Chevrolet Chevelle Concours
1969-1972 Chevrolet Chevelle Concours Estate
1973 Chevrolet Chevelle Deluxe
1969-1972 Chevrolet Chevelle Greenbrier
1973 Chevrolet Chevelle Laguna
1973 Chevrolet Chevelle Laguna Estate
1974-1975 Chevrolet Chevelle Laguna Type S-3
1965-1974 Chevrolet Chevelle Malibu
1974-1975 Chevrolet Chevelle Malibu Classic
1974 Chevrolet Chevelle Malibu Classic Estate
1973 Chevrolet Chevelle Malibu Estate
1965 Chevrolet Chevelle Malibu Super Sport
1968-1972 Chevrolet Chevelle Nomad
1971-1972 Chevrolet Chevelle SS
1967-1970 Chevrolet Chevelle SS 396
1966 Chevrolet Chevelle Super Sport 396
1968 Chevrolet Chevy II Nova
1965-1974 Chevrolet Corvette Base
1966-1975 Chevrolet El Camino Base
1975 Chevrolet El Camino Classic
1968-1974 Chevrolet El Camino Custom
1968-1975 Chevrolet El Camino SS
1969-1970 Chevrolet Estate Base
1973-1974 Chevrolet G10 Van Base
1976 Chevrolet G20 Beauville
1976 Chevrolet G20 Chevy Van
1976 Chevrolet G20 Sportvan
1973-1974 Chevrolet G20 Van Base
1973-1974 Chevrolet G20 Van Sportvan
1975-1976,1988-1990 Chevrolet G30 Beauville
1975-1976,1988-1990 Chevrolet G30 Chevy Van
1975-1976,1988-1990 Chevrolet G30 Hi-Cube
1975-1976,1988-1990 Chevrolet G30 Sportvan
1973-1974 Chevrolet G30 Van Base
1965-1976 Chevrolet Impala Base
1975-1976 Chevrolet Impala Custom
1976 Chevrolet Impala Custom Landau
1976 Chevrolet Impala S
1975-1976 Chevrolet Impala Sport
1965-1967 Chevrolet Impala SS
1976,1979-1980 Chevrolet K10 Cheyenne
1976,1979-1980 Chevrolet K10 Custom Deluxe
1976,1979-1980 Chevrolet K10 Scottsdale
1976,1979-1980 Chevrolet K10 Silverado
1968-1974 Chevrolet K10 Pickup Base
1968-1974 Chevrolet K10 Suburban Base
1976-1978,1980 Chevrolet K20 Cheyenne
1976-1978,1980 Chevrolet K20 Custom Deluxe
1976-1978,1980 Chevrolet K20 Scottsdale
1976-1978,1980 Chevrolet K20 Silverado
1968-1974 Chevrolet K20 Pickup Base
1968-1974 Chevrolet K20 Suburban Base
1985 Chevrolet K20 Suburban Custom
1985 Chevrolet K20 Suburban Scottsdale
1985 Chevrolet K20 Suburban Silverado
1977,1980-1981 Chevrolet K30 Cheyenne
1981-1986 Chevrolet K30 Custom
1977,1980 Chevrolet K30 Custom Deluxe
1981 Chevrolet K30 Deluxe
1977,1980-1986 Chevrolet K30 Scottsdale
1977,1980-1986 Chevrolet K30 Silverado
1968-1974 Chevrolet K30 Pickup Base
1988-1990 Chevrolet K3500 Cheyenne
1988-1990 Chevrolet K3500 Scottsdale
1988-1990 Chevrolet K3500 Silverado
1976 Chevrolet K5 Blazer Base
1976-1978 Chevrolet K5 Blazer Cheyenne
1977-1978 Chevrolet K5 Blazer Custom Deluxe
1978 Chevrolet K5 Blazer Silverado
1969-1972 Chevrolet Kingswood Base
1969-1972 Chevrolet Kingswood Estate
1970-1974 Chevrolet Monte Carlo Base
1973-1974 Chevrolet Monte Carlo Landau
1973,1975 Chevrolet Monte Carlo S
1969-1972 Chevrolet Nova Base
1973 Chevrolet P10 Van Base
1976,1979 Chevrolet P20 Base
1976,1979 Chevrolet P20 Step-Van
1970-1971,1973 Chevrolet P20 Van Base
1975-1989 Chevrolet P30 Base
1975-1985,1987-1989 Chevrolet P30 Step-Van
1970-1974 Chevrolet P30 Van Base
1988 Chevrolet R20 Cheyenne
1987-1988 Chevrolet R20 Custom Deluxe
1987-1988 Chevrolet R20 Scottsdale
1987-1988 Chevrolet R20 Silverado
1987 Chevrolet R20 Suburban Custom Deluxe
1987-1988 Chevrolet R20 Suburban Scottsdale
1987-1988 Chevrolet R20 Suburban Silverado
1989 Chevrolet R2500 Cheyenne
1989 Chevrolet R2500 Scottsdale
1989 Chevrolet R2500 Silverado
1989-1990 Chevrolet R2500 Suburban Scottsdale
1989-1990 Chevrolet R2500 Suburban Silverado
1988 Chevrolet R30 Cheyenne
1987-1988 Chevrolet R30 Custom Deluxe
1987-1988 Chevrolet R30 Scottsdale
1987-1988 Chevrolet R30 Silverado
1989-1990 Chevrolet R3500 Cheyenne
1989-1990 Chevrolet R3500 Scottsdale
1989-1990 Chevrolet R3500 Silverado
1969-1972 Chevrolet Townsman Base
1987 Chevrolet V20 Suburban Custom Deluxe
1987-1988 Chevrolet V20 Suburban Scottsdale
1987-1988 Chevrolet V20 Suburban Silverado
1990 Chevrolet V2500 Suburban Scottsdale
1990 Chevrolet V2500 Suburban Silverado
1988 Chevrolet V30 Cheyenne
1987-1988 Chevrolet V30 Custom Deluxe
1987-1988 Chevrolet V30 Scottsdale
1987-1988 Chevrolet V30 Silverado
1989-1990 Chevrolet V3500 Cheyenne
1989-1990 Chevrolet V3500 Scottsdale
1989-1990 Chevrolet V3500 Silverado
1975-1978 GMC C15 Base
1977-1978 GMC C15 Heavy Half
1975-1978 GMC C15 High Sierra
1977 GMC C15 Indy Hauler
1975-1978 GMC C15 Sierra Classic
1975-1978 GMC C15 Sierra Grande
1978 GMC C15 Street Coupe
1975-1978 GMC C15 Suburban Base
1975-1978 GMC C15 Suburban High Sierra
1975-1978 GMC C15 Suburban Sierra Classic
1975-1978 GMC C15 Suburban Sierra Grande
1968-1974 GMC C15/C1500 Pickup Base
1968-1974 GMC C15/C1500 Suburban Base
1979-1980 GMC C1500 Base
1979-1980 GMC C1500 Heavy Half
1979-1980 GMC C1500 High Sierra
1979-1980 GMC C1500 Sierra Classic
1979-1980 GMC C1500 Sierra Grande
1979-1980 GMC C1500 Street Coupe
1979-1980 GMC C1500 Suburban Base
1979-1980 GMC C1500 Suburban High Sierra
1979-1980 GMC C1500 Suburban Sierra Classic
1979-1980 GMC C1500 Suburban Sierra Grande
1975-1978 GMC C25 Base
1975-1978 GMC C25 High Sierra
1975-1978 GMC C25 Sierra Classic
1975-1978 GMC C25 Sierra Grande
1975-1978 GMC C25 Suburban Base
1975-1978 GMC C25 Suburban High Sierra
1975-1978 GMC C25 Suburban Sierra Classic
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SKU: 11255242965

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4.9 ★★★★★
Based on 7 reviews
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Product Reviews
S
Verified Purchase
SpartanGrad
Carnegie, US
★★★★★ 5
Can't ask for more from a 7.1 or 5.1.2 receiver
Style: Receiver, Style: Receiver
My previous Yamaha receiver was 10 ys old, and was an entry level 5.1 model (RX-V373). I accidentally fried it by putting my phone's USB connector in. I have been wanting to upgrade for a while the last few yrs but waited it out until receivers have 8k pass through (so whenever 8k becomes more of a thing I can keep this new one a bit longer). The 3773 had 4k pass through when I got it 10 yrs ago, well before 4k became as available as it is now for example, which was one reason I held out on replacing as long as I did. This time around I decided to step up into the premium Aventage line of Yamaha. It was between this & the A4A, not a huge price difference, but I would have needed to replace my entertainment center since the A4A is too deep to fit. Didn't seem worth it & now I'm really happy with my choice. My living room set up (in a condo) has 2 surrounds, to add 2 more would require building mounts on the wall (couch is against the wall with 2 surrounds on side tables) which I don't want. This has 7 channels to allow for 2 Atmos front firing speakers which I got & love how immersive it sounds. Bi-amping the front towers is an option, but that uses 2 extra channels so the Atmos front speakers can't be connected at the same time as bi-amping. I experimented with biamping & biwiring & couldn't hear any difference so I have the fronts biwired, allowing for the 2 Atmos front connections. New features/improvements from my old receiver include more power/watts, lower THD & better sound, streaming music directly from the receiver with Music Cast, and it processes Atmos & DTS audio. One key feature all the Aventage models have that the RX ones don't is the 5th foot in the middle, which was designed & tested to improve the sound with more stabilization. Aventage also has a 3 yr warranty (vs 2 for RX). The top of the line RX model looks identical in specs which I also considered but it just sounds like this 1st Aventage model is slightly better with it its parts & sound quality, and not that much more. Especially since I got the A2A on sale for 999.95 (vs the 1200 price). I actually bought this for 1150 which was a teeny mark down, and then saw Amazon put it on sale for 999.95 shortly after (about 2 weeks). Amazon customer service was great when I called about that, and they credited the difference. Back to the receiver...2 subwoofers can be connected, and an amplifier for the 2 front speakers can be connected as well through pre outs. Probably more improvements but those are the main ones. Along with this receiver upgrade, I also upgraded my subwoofer & added a Nvidia Shield Pro streamer (due to it handling Atmos & 4k upscaling of lower hd content, which my Roku Ultra cannot do). My system now includes Polk TSI 400 front towers Polk CS20 center, Polk T15 surrounds (all of these Polk speakers are from 10 yrs ago as well & still work great for me, they sound better too with this receiver). I added Klipsch R-41SA Atmos front firing speakers, and upgraded from a Polk PSW505 subwoofer to an SVS SB3000 (night & day difference with that upgrade!). Have a Roku Ultra from a few yrs ago, and the Nvidia as well now. The TV also will be upgraded at some point, but I'm perfectly content with it now (is a 7 yrs old 55 inch 4K Sony Bravia). This receiver also processes Dolby Vision which I'd need a new TV for, as well as eArc which this receiver also has. Over time I will continue adding to my set up. A decent record player is next, and a current blu ray player (the one I have is rather old & only has 1080p). Then a new TV & A 2nd sub (will get another SVS SB3000). The last & most expensive upgrade will be the rest of the speakers. From Polk to B&W most likely, but when I get to this I will compare both at the same price point as I am still very impressed with the quality of my Polks for their price point. I also plan to add an amp (Emotiva most likely) to power the fronts. Another reason I was ok with the A2A watts per channel for now (100 with 2 channels driven for music, unsure what it is at 5.1.2 but it's plenty especially with the thunder the SVS sub provides even at low volumes, and the ability to boost dialogue in addition to the center channel. I'd rather get a dedicated amp for more music power than a higher priced receiver just due to more watts. Very pricey to do all of this at once (in particular the speakers & amp), but for now I am thrilled with how much better everything sounds with these phase 1 upgrades. Highly recommend it, if you are coming from an entry level budget receiver this can pump more life into your current speakers.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2023
A
Verified Purchase
Amazon Customer
Massapequa, US
★★★★★ 5
Sounds fantastic and easy to operate
Style: Receiver
I used to sell home audio equipment a long time ago and I love this unit! Nice & clean look, the layout for inputs/output is standard and easy to see and the remote makes sense...well, to me it does lol. I had purchased an O***o unit because it's been good brand for a while...returned it because it was defective but I didn't care for it (you had to be a real audiophile to get into the setup and who has time for that?). The Yamaha is easy to work with and sounds fantastic. Make sure you don't go cheap on the speakers!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 30, 2026
N
Verified Purchase
N. Franke
Boise, US
★★★★★ 5
Great when on sale
Style: Receiver
Update: I got a new Sony X90L TV and this receiver just doesn't like that TV or something. I've had at least 4 instances where the TV said there was no signal. The receiver was on and the proper input was selected. If I hit the menu button on the receiver, I could see that. No inputs on the receiver would work. Unplugging the power from the receiver and plugging it back in fixes the problem in every case. Based on my googling, many others have similar problems. Yamaha receivers are generally over priced I've noticed. And they seem to skimp on features, e.g. a receiver with an MSRP of $1000 doesn't have a single analog video input. I got this on sale for $650 and for that I'm quite happy. I had a Denon that I got pretty inexpensively, but I hated the Denon. Things didn't work, it was confusing, didn't sound all that good and didn't do HDMI input switching well. The Yamaha is a far better reliever in every way. It does cost quite a bit more but it's just so much nicer.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 14, 2024
X
Verified Purchase
Xterra rocks!
Grantham, US
★★★★★ 5
Modern interfaces, clean sound of Yamaha, tons of features and intelligence.
Style: Receiver
Modern interfaces, clean sound of Yamaha, tons of features and intelligence. Purchased this to replace my amazing RX3300 (it started turning off on its own), and wasn't sure these newer generations of AV receivers would have the same clean and powerful sound, but the RX-A2A did not disappoint. Plus I am loving all of the new features and more relevant interfaces. It provides great value for the price. It is one of the few brands that kept the original sound as natural as possible (of course, there are plenty of modes to choose from for specific characteristics, but only if you choose). Perfect fit for my large family room.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
J
Verified Purchase
JM
Houston, US
★★★★★ 1
Hours of my life I won’t get back.
Style: Receiver
I tried to make this system work. I REALLY did. Probably blew 10 hours trying to somehow make it work. Had to return it. Customer Support - What customer support? Yamaha cut hours from weak 9 to only 5 hrs a day. Email/chat got no call back. It’s so bad I’m not sure Yamaha is gonna make it. Lip sync - Impossible to fix video to sound lag. Musiccast wireless - See lag. Also sound is tinny as hell. Also won’t stay linked. Could not get speakers to respond to giant volume knob. Would respond to app. App was mediocre. Tried to use with YSP-5600 sound bar which is allegedly Mussiccast. Nope. In short, it has been a HORRIBLE experience and I really tried.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 12, 2022

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