Cometic Chevy Small Block 4.165 inch Bore .040 inch MLS Head Gasket (w/All Steam Holes)
Fits 1980–1985 Avanti II, 1980–1981 Buick Century and more
All 265 applications- Authorized dealerGenuine Cometic Gasket parts, sourced direct
- 30-day returnsSee the return policy
- Diesel techs on the line908-223-9744, call or text
- Secure checkout
Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0.040". With Steam Holes. 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.
- The embossed outer layers of the gaskets meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes
- The center or shim layer is an uncoated stainless steel layer which can be varied to accommodate multiple thickness requirements
- Requires less clamp load creating less bore distortion
- Conforms load distribution across the sealing area
- Embossed Outer Layers Coated w/Viton
- Brand
- Cometic Gasket
- Part number
- C5248-040
- SKU
- CGSC5248-040
- UPC
- 191070007232
- Category
- Head Gaskets
- Weight
- 0.8 lb
- Shipping
- Ground, ships in 1 to 2 business days
- 1980–1985Avanti II
- 1980–1981Buick Century
- 1982Buick LeSabre
- 1980–1986Buick Regal
- 1980–1982Checker Marathon
- 1980–1986Chevrolet C10
- 1980–1986Chevrolet C10 Suburban
- 1980–1986Chevrolet C20
- 1980–1986Chevrolet C20 Suburban
- 1980–1986Chevrolet C30
- 1980–1986Chevrolet Camaro
- 1980–1986Chevrolet Caprice
- 1980–1986Chevrolet Corvette
- 1980–1986Chevrolet El Camino
- 1980–1986Chevrolet G10
- 1980–1986Chevrolet G20
- 1980–1986Chevrolet G30
- 1980–1985Chevrolet Impala
- 1980–1986Chevrolet K10
- 1980–1986Chevrolet K10 Suburban
- 1980–1986Chevrolet K20
- 1980–1986Chevrolet K20 Suburban
- 1980–1986Chevrolet K30
- 1980–1986Chevrolet K5 Blazer
- 1980–1983Chevrolet Malibu
- 1980–1986Chevrolet Monte Carlo
- 1983–1986Excalibur Phaeton
- 1980–1986GMC C1500
- 1980–1986GMC C1500 Suburban
- 1980–1986GMC C2500
- 1980–1986GMC C2500 Suburban
- 1980–1986GMC C3500
- 1980–1986GMC Caballero
- 1980–1986GMC G1500
- 1980–1986GMC G2500
- 1980–1986GMC G3500
- 1980–1986GMC Jimmy
- 1980–1986GMC K1500
- 1980–1986GMC K1500 Suburban
- 1980–1986GMC K2500
- 1980–1986GMC K2500 Suburban
- 1980–1986GMC K3500
- 1980–1981Oldsmobile Cutlass
- 1980–1984Oldsmobile Cutlass Calais
- 1980–1983Oldsmobile Cutlass Cruiser
- 1980Oldsmobile Cutlass Salon
- 1980–1986Oldsmobile Cutlass Supreme
- 1981–1982Oldsmobile Delta 88
- 1983–1986Pontiac Bonneville
- 1980–1981Pontiac Catalina
- 1980–1986Pontiac Firebird
- 1980Pontiac Grand Am
- 1980–1981Pontiac Grand LeMans
- 1980–1986Pontiac Grand Prix
- 1980–1981Pontiac LeMans
- 1983–1986Pontiac Parisienne
| Years | Make | Model | Submodel |
|---|---|---|---|
| 1980–1981 | Chevrolet | C10 | Cheyenne |
| 1981–1986 | Chevrolet | C10 | Custom |
| 1980 | Chevrolet | C10 | Custom Deluxe |
| 1981 | Chevrolet | C10 | Deluxe |
| 1980–1986 | Chevrolet | C10 | Scottsdale |
| 1980–1986 | Chevrolet | C10 | Silverado |
| 1981–1986 | Chevrolet | C10 Suburban | Custom |
| 1980–1981 | Chevrolet | K30 | Cheyenne |
| 1981–1986 | Chevrolet | K30 | Custom |
| 1980 | Chevrolet | K30 | Custom Deluxe |
| 1981 | Chevrolet | K30 | Deluxe |
| 1980–1986 | Chevrolet | K30 | Scottsdale |
| 1980–1986 | Chevrolet | K30 | Silverado |
| 1980 | Chevrolet | K5 Blazer | Cheyenne |
| 1980–1981 | Oldsmobile | Cutlass | Brougham |
| 1980–1981 | Oldsmobile | Cutlass | LS |
| 1980 | Oldsmobile | Cutlass Calais | Base |
| 1982 | Oldsmobile | Cutlass Calais | Base |
| 1984 | Oldsmobile | Cutlass Calais | Base |
| 1984 | Oldsmobile | Cutlass Calais | Hurst |
| 1980–1981 | Pontiac | LeMans | Safari |
| 1983–1986 | Pontiac | Parisienne | Base |
| 1983–1986 | Pontiac | Parisienne | Brougham |
| 1980–1982 | GMC | C2500 | Sierra Grande |
| 1980–1986 | GMC | C2500 Suburban | Base |
| 1980–1986 | GMC | C2500 Suburban | High Sierra |
| 1980–1986 | GMC | C2500 Suburban | Sierra Classic |
| 1980–1982 | GMC | C2500 Suburban | Sierra Grande |
| 1980–1986 | GMC | C3500 | Base |
| 1980–1982 | GMC | K1500 Suburban | Sierra Grande |
| 1980–1986 | GMC | K2500 | Base |
| 1980–1986 | GMC | K2500 | High Sierra |
| 1980–1986 | GMC | K2500 | Sierra Classic |
| 1980–1982 | GMC | K2500 | Sierra Grande |
| 1980–1986 | GMC | K2500 Suburban | Base |
| 1980–1986 | GMC | K2500 Suburban | High Sierra |
| 1980–1983 | Chevrolet | Malibu | Classic |
| 1980 | Chevrolet | Malibu | Classic Estate |
| 1980–1981 | Chevrolet | Malibu | Classic Landau |
| 1980 | Chevrolet | Malibu | Classic Sport |
| 1980 | Chevrolet | Malibu | Estate |
| 1980 | Chevrolet | Malibu | Sport |
| 1981–1986 | Chevrolet | Monte Carlo | Base |
| 1980–1985 | Avanti | II | Base |
| 1985 | Avanti | II | GT |
| 1980–1981 | Buick | Century | Base |
| 1980–1981 | Buick | Century | Estate |
| 1980–1981 | Buick | Century | Limited |
| 1980–1981 | Buick | Century | Sport |
| 1982 | Buick | LeSabre | Custom |
| 1982 | Buick | LeSabre | Limited |
| 1980–1986 | Chevrolet | C30 | Silverado |
| 1980 | Chevrolet | Camaro | Base |
| 1980–1986 | Chevrolet | Camaro | Berlinetta |
| 1985–1986 | Chevrolet | Camaro | Iroc-Z |
| 1980 | Chevrolet | Camaro | Rally Sport |
| 1981–1986 | Chevrolet | Camaro | Sport |
| 1980–1986 | Chevrolet | Camaro | Z28 |
| 1980–1986 | Chevrolet | G10 | Chevy Van |
| 1980–1986 | Chevrolet | G10 | Sportvan |
| 1980–1986 | Chevrolet | G20 | Beauville |
| 1983–1984 | Chevrolet | G20 | Bonaventure |
| 1980–1986 | Chevrolet | G20 | Chevy Van |
| 1980–1981 | Chevrolet | G20 | Nomad |
| 1980–1986 | Chevrolet | G20 | Sportvan |
| 1980–1986 | Chevrolet | G30 | Beauville |
| 1983–1984 | Chevrolet | G30 | Bonaventure |
| 1980–1986 | Chevrolet | G30 | Chevy Van |
| 1980–1986 | Chevrolet | G30 | Hi-Cube |
| 1980–1986 | Chevrolet | G30 | Sportvan |
| 1980–1985 | Chevrolet | Impala | Base |
| 1981–1982 | Chevrolet | Impala | Estate |
| 1980–1986 | Chevrolet | K20 | Scottsdale |
| 1980–1983 | Chevrolet | K20 | Silverado |
| 1985–1986 | Chevrolet | K20 | Silverado |
| 1981–1986 | Chevrolet | K20 Suburban | Custom |
| 1980 | Chevrolet | K20 Suburban | Custom Deluxe |
| 1981 | Chevrolet | K20 Suburban | Deluxe |
| 1980–1986 | GMC | C1500 Suburban | High Sierra |
| 1980–1986 | GMC | C1500 Suburban | Sierra Classic |
| 1980–1982 | GMC | C1500 Suburban | Sierra Grande |
| 1980–1986 | GMC | C2500 | Base |
| 1980–1986 | GMC | C2500 | High Sierra |
| 1980–1986 | GMC | C2500 | Sierra Classic |
| 1980–1986 | GMC | C3500 | High Sierra |
| 1980–1986 | GMC | C3500 | Sierra Classic |
| 1980–1982 | GMC | C3500 | Sierra Grande |
| 1981–1986 | GMC | Caballero | Amarillo |
| 1980–1986 | GMC | Caballero | Base |
| 1981 | GMC | Caballero | Conquista |
| 1980–1986 | GMC | Caballero | Diablo |
| 1980 | GMC | Caballero | Laredo |
| 1980–1986 | GMC | G2500 | Vandura |
| 1980–1986 | GMC | G3500 | Magnavan |
| 1980–1986 | GMC | G3500 | Rally |
| 1980–1986 | GMC | G3500 | Rally Camper Special |
| 1981–1986 | GMC | G3500 | Rally Custom |
| 1980–1986 | GMC | G3500 | Rally STX |
| 1980–1986 | GMC | G3500 | Vandura |
| 1980–1986 | GMC | G3500 | Vandura Special |
| 1980–1986 | GMC | Jimmy | Base |
| 1980–1985 | GMC | Jimmy | High Sierra |
| 1980–1986 | GMC | Jimmy | Sierra Classic |
| 1980–1982 | GMC | Jimmy | Sierra Grande |
| 1980–1982 | GMC | Jimmy | Street Coupe |
| 1980–1986 | GMC | K1500 | Base |
| 1980–1986 | GMC | K1500 | High Sierra |
| 1980–1986 | GMC | K1500 | Sierra Classic |
| 1980–1982 | GMC | K1500 | Sierra Grande |
| 1980–1986 | GMC | K1500 Suburban | Base |
| 1980–1986 | GMC | K1500 Suburban | High Sierra |
| 1980–1986 | GMC | K1500 Suburban | Sierra Classic |
| 1980–1986 | GMC | K2500 Suburban | Sierra Classic |
| 1980–1982 | GMC | K2500 Suburban | Sierra Grande |
| 1980–1986 | GMC | K3500 | Base |
| 1980–1986 | GMC | K3500 | High Sierra |
| 1980–1986 | GMC | K3500 | Sierra Classic |
| 1980–1982 | GMC | K3500 | Sierra Grande |
| 1980 | Oldsmobile | Cutlass | Base |
| 1980 | Chevrolet | C10 Suburban | Custom Deluxe |
| 1981 | Chevrolet | C10 Suburban | Deluxe |
| 1980 | Chevrolet | C10 Suburban | Scottsdale |
| 1982 | Chevrolet | C10 Suburban | Scottsdale |
| 1984–1986 | Chevrolet | C10 Suburban | Scottsdale |
| 1980 | Chevrolet | C10 Suburban | Silverado |
| 1980 | Chevrolet | C20 Suburban | Silverado |
| 1982–1986 | Chevrolet | C20 Suburban | Silverado |
| 1980–1981 | Chevrolet | C30 | Cheyenne |
| 1981–1986 | Chevrolet | C30 | Custom |
| 1980 | Chevrolet | C30 | Custom Deluxe |
| 1981 | Chevrolet | C30 | Deluxe |
| 1980–1986 | Chevrolet | C30 | Scottsdale |
| 1980 | Chevrolet | Caprice | Classic Sport |
| 1980–1982 | Chevrolet | Corvette | Base |
| 1984–1986 | Chevrolet | Corvette | Base |
| 1982 | Chevrolet | Corvette | Collector's Edition |
| 1986 | Chevrolet | Corvette | Indianapolis 500 Pace Car |
| 1980–1986 | Chevrolet | El Camino | Base |
| 1980 | Chevrolet | Impala | Sport |
| 1980–1981 | Chevrolet | K10 | Cheyenne |
| 1981–1986 | Chevrolet | K10 | Custom |
| 1980 | Chevrolet | K10 | Custom Deluxe |
| 1981 | Chevrolet | K10 | Deluxe |
| 1980–1986 | Chevrolet | K10 | Scottsdale |
| 1980–1986 | Chevrolet | K10 | Silverado |
| 1980 | Chevrolet | K10 Suburban | Silverado |
| 1982–1983 | Chevrolet | K10 Suburban | Silverado |
| 1985–1986 | Chevrolet | K10 Suburban | Silverado |
| 1980–1981 | Chevrolet | K20 | Cheyenne |
| 1981–1986 | Chevrolet | K20 | Custom |
| 1980 | Chevrolet | K20 | Custom Deluxe |
| 1981 | Chevrolet | K20 | Deluxe |
| 1980 | Chevrolet | K20 Suburban | Scottsdale |
| 1982 | Chevrolet | K20 Suburban | Scottsdale |
| 1984–1986 | Chevrolet | K20 Suburban | Scottsdale |
| 1980 | Chevrolet | K20 Suburban | Silverado |
| 1982–1983 | Chevrolet | K20 Suburban | Silverado |
| 1985–1986 | Chevrolet | K20 Suburban | Silverado |
| 1980 | Oldsmobile | Cutlass Cruiser | Base |
| 1982–1983 | Oldsmobile | Cutlass Cruiser | Base |
| 1980 | Oldsmobile | Cutlass Cruiser | Brougham |
| 1980 | Oldsmobile | Cutlass Salon | Base |
| 1980 | Oldsmobile | Cutlass Salon | Brougham |
| 1980 | Oldsmobile | Cutlass Supreme | Base |
| 1981–1986 | Chevrolet | C20 Suburban | Custom |
| 1980 | Chevrolet | C20 Suburban | Custom Deluxe |
| 1981 | Chevrolet | C20 Suburban | Deluxe |
| 1980 | Chevrolet | C20 Suburban | Scottsdale |
| 1982 | Chevrolet | C20 Suburban | Scottsdale |
| 1984–1986 | Chevrolet | C20 Suburban | Scottsdale |
| 1981–1986 | Chevrolet | El Camino | Conquista |
| 1980–1981 | Chevrolet | El Camino | Royal Knight |
| 1980–1986 | Chevrolet | El Camino | SS |
| 1983 | Chevrolet | G10 | Base |
| 1980–1986 | Chevrolet | G10 | Beauville |
| 1981–1984 | Chevrolet | G10 | Bonaventure |
| 1986 | Chevrolet | G10 | Bonaventure |
| 1981–1986 | Chevrolet | K10 Suburban | Custom |
| 1980 | Chevrolet | K10 Suburban | Custom Deluxe |
| 1981 | Chevrolet | K10 Suburban | Deluxe |
| 1980 | Chevrolet | K10 Suburban | Scottsdale |
| 1982 | Chevrolet | K10 Suburban | Scottsdale |
| 1984–1986 | Chevrolet | K10 Suburban | Scottsdale |
| 1981–1986 | Chevrolet | K5 Blazer | Custom |
| 1980 | Chevrolet | K5 Blazer | Custom Deluxe |
| 1981 | Chevrolet | K5 Blazer | Deluxe |
| 1984 | Chevrolet | K5 Blazer | Scottsdale |
| 1980–1986 | Chevrolet | K5 Blazer | Silverado |
| 1980–1981 | Chevrolet | Malibu | Base |
| 1981 | GMC | Caballero | Royal Knight |
| 1980–1986 | GMC | G1500 | Rally |
| 1983–1984 | GMC | G1500 | Rally Custom |
| 1980–1986 | GMC | G1500 | Rally STX |
| 1980–1986 | GMC | G1500 | Vandura |
| 1980–1986 | GMC | G2500 | Rally |
| 1983–1984 | GMC | G2500 | Rally Custom |
| 1980–1986 | GMC | G2500 | Rally STX |
| 1981 | Pontiac | Grand Prix | Brougham |
| 1983–1986 | Pontiac | Grand Prix | Brougham |
| 1984–1986 | Pontiac | Grand Prix | LE |
| 1980–1981 | Pontiac | Grand Prix | LJ |
| 1983 | Pontiac | Grand Prix | LJ |
| 1980 | Pontiac | Grand Prix | SJ |
| 1980–1981 | Pontiac | LeMans | Base |
| 1982–1983 | Oldsmobile | Cutlass Supreme | Base |
| 1985–1986 | Oldsmobile | Cutlass Supreme | Base |
| 1980 | Oldsmobile | Cutlass Supreme | Brougham |
| 1982–1983 | Oldsmobile | Cutlass Supreme | Brougham |
| 1985–1986 | Oldsmobile | Cutlass Supreme | Brougham |
| 1982–1986 | Chevrolet | C10 Suburban | Silverado |
| 1980–1981 | Chevrolet | C20 | Cheyenne |
| 1981–1986 | Chevrolet | C20 | Custom |
| 1980 | Chevrolet | C20 | Custom Deluxe |
| 1981 | Chevrolet | C20 | Deluxe |
| 1980–1986 | Chevrolet | C20 | Scottsdale |
| 1980–1986 | Chevrolet | C20 | Silverado |
| 1982–1986 | Pontiac | Firebird | S/E |
| 1980–1986 | Pontiac | Firebird | Trans Am |
| 1980 | Pontiac | Grand Am | Base |
| 1980–1981 | Pontiac | Grand LeMans | Base |
| 1980–1981 | Pontiac | Grand LeMans | Safari |
| 1980–1981 | Pontiac | Grand Prix | Base |
| 1983–1986 | Pontiac | Grand Prix | Base |
| 1982 | Buick | LeSabre | Limited Edition F/E |
| 1980–1981 | Buick | Regal | Base |
| 1986 | Buick | Regal | Base |
| 1980–1981 | Buick | Regal | Limited |
| 1986 | Buick | Regal | Limited |
| 1980–1982 | Checker | Marathon | Base |
| 1980–1982 | Checker | Marathon | Deluxe |
| 1980 | Chevrolet | C10 | Big Ten |
| 1982 | Chevrolet | Camaro | Z28 Indianapolis 500 Pace Car |
| 1986 | Chevrolet | Caprice | Base |
| 1980–1986 | Chevrolet | Caprice | Classic |
| 1986 | Chevrolet | Caprice | Classic Brougham |
| 1981–1982 | Chevrolet | Caprice | Classic Estate |
| 1980–1981 | Chevrolet | Caprice | Classic Landau |
| 1983–1986 | Pontiac | Bonneville | Brougham |
| 1984–1986 | Pontiac | Bonneville | LE |
| 1980–1981 | Pontiac | Catalina | Base |
| 1980–1981 | Pontiac | Catalina | Safari |
| 1980–1986 | Pontiac | Firebird | Base |
| 1980–1981 | Pontiac | Firebird | Esprit |
| 1980–1981 | Pontiac | Firebird | Formula |
| 1983 | Chevrolet | Monte Carlo | CL |
| 1980–1981 | Chevrolet | Monte Carlo | Landau |
| 1986 | Chevrolet | Monte Carlo | LS |
| 1980 | Chevrolet | Monte Carlo | Sport |
| 1983–1986 | Chevrolet | Monte Carlo | SS |
| 1985 | Excalibur | Phaeton | Anniversary |
| 1983–1984 | Excalibur | Phaeton | Base |
| 1985 | Oldsmobile | Cutlass Supreme | LS |
| 1981–1982 | Oldsmobile | Delta 88 | Base |
| 1981 | Oldsmobile | Delta 88 | Holiday |
| 1981–1982 | Oldsmobile | Delta 88 | Royale |
| 1981–1982 | Oldsmobile | Delta 88 | Royale Brougham |
| 1983–1986 | Pontiac | Bonneville | Base |
| 1986 | Excalibur | Phaeton | Base |
| 1980–1986 | GMC | C1500 | Base |
| 1980 | GMC | C1500 | Heavy Half |
| 1980–1986 | GMC | C1500 | High Sierra |
| 1980–1986 | GMC | C1500 | Sierra Classic |
| 1980–1982 | GMC | C1500 | Sierra Grande |
| 1980–1982 | GMC | C1500 | Street Coupe |
| 1980–1986 | GMC | C1500 Suburban | Base |
Applications are the manufacturer's published fitment for this part number.
Not sure it fits? Call 908-223-9744 or text us the year, model and engine. We confirm fitment before you order.
- Shipping
- In-stock parts ship in 1 to 2 business days. Tracking is emailed as soon as the label prints.
- Returns
- 30-day returns on unused parts in the original packaging. Return policy.
- Warning
- This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Reviews
What customers say
Verified reviews collected by Loox from real orders.
Good to know
Questions, answered straight.
If it is not here, call or text the counter. Real people, real answers.
Fitment
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Will this fit my truck?
The Fits section at the top of the page lists the manufacturer's applications for this exact part. If your year, make and model is not there, or you are not sure, text us a photo of what you are replacing with your year and engine and we will confirm it before you order.
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What if I order the wrong part?
Call or text us before it ships and we will swap it. After delivery you have 30 days to return it in new, uninstalled condition. The return policy has the restocking details.
Shipping
-
When will it ship?
In-stock parts usually ship within 1 to 2 business days from warehouses across the USA. The stock line under the options tells you the status of the part you are looking at. Large items ship LTL freight and we call to schedule delivery.
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Why did I only get part of my order?
We ship from multiple warehouses, so an order with several items can arrive in more than one box. Tracking for each shipment is emailed as it goes out. Full details in the shipping policy.
Returns and warranty
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What is the return policy?
30 days from delivery, in new and uninstalled condition, with a restocking fee. Everything is spelled out in the Returns & Refund Policy.
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How do warranty claims work?
We are an authorized dealer, so the manufacturer's warranty applies to every part we sell. Call or text us with your order number and we handle the claim with the brand for you.
Paying
-
Can I pay over time?
Yes. Shop Pay installments are offered at checkout on qualifying orders, and the monthly estimate shows right under the price.
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What is a core deposit?
Some remanufactured parts, like injectors and turbos, carry a refundable core deposit. It is shown on the product page when it applies and refunded when your old part comes back to us.
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Why buy here
A diesel shop that sells parts, not a website that sells boxes.
Every part on this site is one our own techs can stand behind.
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We run what we sell
A working diesel repair and fabrication shop in Nazareth, PA. These are the parts our techs install every week.
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Real techs on the phone
Call or text 908-223-9744 and you get a diesel tech, not a script.
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Authorized dealer
Genuine parts straight from the manufacturer, with the factory warranty behind them.
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Fast from stock
Most in-stock parts ship in 1 to 2 business days from warehouses across the USA.
Authorized dealer for 140+ brands
All brands- 7+ Years in business
- 6+ Shop technicians
- 30,000+ In-stock SKUs
- 25+ Trucks given away
The shop floor, Nazareth, PAFull Send Diesel, Nazareth, PA
A team of diesel people, not a call center.
Full Send Diesel is a shop full of techs, builders and parts people in Nazareth, Pennsylvania. When you call or text, you reach someone who works on these trucks and knows the parts.
Not sure what you need? Send a photo of what you are replacing with your year and engine. We will point you to the right part, confirm it is in stock, and get it moving.
Mon–Fri, 8am–4pm ET. After hours, text or email and we answer first thing in the morning.































