SKU: 11784071161

Cometic Chevrolet Mark-IV Big Block V8 4.540in Bore .040in MLS Cylinder Head Gasket

Sale price$102.56 Regular price$113.95
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Description

Cometic Chevrolet Mark-IV Big Block V8 4.540in Bore .040in MLS Cylinder 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: 11784071161

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4.2 ★★★★★
Based on 8 reviews
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Product Reviews
Y
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Yana Duke
Houston, US
★★★★★ 1
CHOKING HAZARD
Flavor Name: Bone (S), Size: 6 Count (Pack of 1)
CHOKING HAZARD: I purchased these bones for my small Yorki.. He ate the first two without incident; however, on the third bone he unfortunately choked. As the bones wear down, they become extremely stringy, and those strands do not appear to be digestible. I had to rush my dog to the emergency room, which cost $700. Three days later, he became even sicker because he was unable to pass the remaining portion of the bone still in his stomach. I then had to take him to his regular veterinarian, where he was admitted overnight and diagnosed with pancreatitis and a severely irritated gastrointestinal tract. This entire ordeal cost me over $1,500 in addition to the initial $700 emergency visit. I am grateful that my dog is now alive and well, but these bones pose a serious choking hazard and do not digest properly. I strongly caution other pet owners, especially those with small dogs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 14, 2026
A
Verified Purchase
A. Wu
Louisville, US
★★★★★ 5
One of the cleanest, most reliable creatine options out there
Flavor Name: Unflavored, Size: 30 Servings (Pack of 1)
I’ve tried quite a few creatine brands over the years, and the Thorne Creatine – Micronized Creatine Monohydrate Powder is easily one of the highest-quality options I’ve used. What stands out immediately is how clean and simple the formula is—just pure micronized creatine monohydrate with no fillers or additives. Each serving gives you the standard 5g dose, and it’s NSF Certified for Sport, which adds an extra layer of confidence around quality and purity. Mixability is excellent. Because it’s micronized, it dissolves much better than a lot of other creatine powders I’ve tried—no clumping or gritty texture, even in just water. Performance-wise, it does exactly what you want from a creatine: improved strength, better endurance during workouts, and faster recovery between sessions. Creatine monohydrate is also the most well-researched and proven form for performance and muscle gains, which is why I stick with it. Another big plus is that it’s completely unflavored, so it’s easy to mix into anything—protein shakes, pre-workout, or just water—without affecting taste. Overall, this is a no-frills, high-quality creatine that delivers exactly what you expect. If you’re looking for a clean, trusted supplement that just works, this is an easy recommendation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2026
M
Verified Purchase
MentzerAppreciator
Fort Morgan, US
★★★★★ 5
Great Creatine Monohydrate That Doesn’t Give Me Cramps
Flavor Name: Unflavored, Size: 90 Servings (Pack of 1)
I switched over to creatine hcl, a more expensive and less studied version of creatine, after creatine monohydrate gave me terrible cramps. Then I tried this brand, and it is amazing: first creatine monohydrate that doesn’t give me cramps! Mixes well in my juice, and no residual taste. Also comes with a great quality blue scoop. Extremely high quality creatine.
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Reviewed in the United States on May 16, 2026
A
Verified Purchase
Alyse
Draper, US
★★★★★ 5
Cellular energy boosters that protect the brain.
Flavor Name: Unflavored, Size: 90 Servings (Pack of 1)
Creatine monohydrate, a cellular energy enhancer that acts like armor protecting the brain, has been the subject of a groundbreaking study at the University of Sydney that has stunned the medical community. Vegetarians who added five grams of creatine to their daily diet each morning saw an average increase of fifteen points on IQ tests and a 40% improvement in working memory after just six weeks. This isn't just for fitness; it's about energizing brain cells. Creatine isn't just for muscles—a fact 99% of people don't understand. While the brain only accounts for 2% of total body weight, it consumes 20% of the body's energy. Creatine is essentially the fast energy currency needed for neurons to think and form memories. When you add creatine to your coffee, researchers at the University of Chichester discovered a remarkable phenomenon: caffeine, by increasing blood flow to the brain, increased the brain's absorption of creatine by 28%. Simultaneously, creatine completely eliminated the energy crash typically associated with caffeine by maintaining adenosine triphosphate (ATP) levels within neurons. A ten-year follow-up study of 6,000 adults over 60 found that those who consumed five grams of creatine daily experienced a 70% reduction in cognitive decline. MRI scans showed a 50% reduction in brain atrophy, and their reaction times remained at a level 20 years younger than their actual age. These scientific conclusions are astonishing. Creatine acts as a cellular buffering system, instantly replenishing ATP. More importantly, it protects brain cells from excitotoxicity, a process where neurons become exhausted due to overstimulation. Research published in the Journal of Neuroscience shows that creatine supplementation increases brain creatine levels by 39%, which is directly correlated with improved problem-solving abilities and emotional resilience. There's another amazing aspect that's rarely mentioned: research from the University of Utah found that creatine coffee reduced depressive symptoms by up to 52% in treatment-resistant cases because it energizes the mitochondria in brain cells that are often underperforming. Studies also show that people with higher brain creatine levels experience 60% less damage from traumatic brain injuries and recover faster. It's like a cellular airbag for neurons. The correct way to use creatine is to choose creatine monohydrate, which has been validated by over 6,000 studies. Because it doesn't dissolve easily in cold water, you need to stir it thoroughly into hot coffee. Add five grams, about one teaspoon, to your coffee every morning. Adding a little milk or cream is recommended, as the fat helps with absorption and can mask the grainy texture that some people dislike. Consistency is key when taking creatine; since it works through saturation, you need to take it daily for about four weeks to fully saturate your muscle and brain tissue, after which you can maintain the dosage daily. Unlike supplements that provide immediate effects, creatine is cumulative; most people experience improved endurance after seven to ten days, while the full cognitive benefits appear after three to four weeks. Some people use a loading phase of twenty grams per day in divided doses during the first week to achieve saturation faster, but studies show this is not necessary and may cause temporary water retention. Quality is also important; it's recommended to look for brands that have been tested for purity to avoid stomach upset or headaches due to impurities. One thing to note about creatine in coffee is that because water is drawn into the muscle cells, you may gain two to four pounds in the first two weeks, but this is not fat, but rather improved cellular hydration. Multiple studies spanning up to twenty-one years have confirmed the safety of creatine, even showing improvements in kidney function indicators.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 5, 2026
F
Verified Purchase
FM finds
Fort Morgan, US
★★★★★ 5
High quality and smooth
Flavor Name: Unflavored, Size: 90 Servings (Pack of 1)
This mixes really easily and is completely tasteless, which makes it easy to add to drinks. I personally use creatine more for the cognitive benefits than the muscle benefits, and I’ve noticed a positive difference since using it. I wanted a high-quality option and this one definitely feels like it. One thing I like is that it dissolves well and doesn’t have any gritty texture or weird aftertaste. I usually add it to my coffee and it blends in perfectly. I will even add it to smoothies or sometimes just in cold water and drink it. You can’t taste it. I’ve learned to combat the bloat by staying hydrated and drinking a lot of water. For me, drinking it with coffee was fine. But when I had it with tea, since that is a stronger diuretic for me, my stomach did feel bloated and uncomfortable. But I’ll definitely continue using it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2026

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