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Mr. Gasket Copper Seal Header Gaskets 7154

Mr. Gasket Copper Seal Header Gaskets 7154
$108.99 ea
NEWARRIVING SOONEstimated Ship Date 11/18/2025 (If Ordered Today)18 Available from HOLLEY PERFORMANCE PRODUCTS as of 10/31/2025
Model: 4012199
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
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Mr. Gasket CopperSEAL Header Gaskets are a high quality copper gasket that performs extremely well and are reusable. We recommend this in all racing and high performance applications. They are for stock heads unless indicated, and work well in high heat and turbocharged applications.
Features:
  • Manufactured from “Dead Soft” (solid) .043" thick copper material
  • .051" embossment around each exhaust port to seal irregular surfaces. Total gasket thickness .094"
  • Provides excellent sealing and durability
  • Conforms to and seals minor surface irregularities
  • For high performance street, drag race, oval track and turbocharged (extreme heat) applications

Downloads:

Download Name File Size
mr_gasket_instructions_copperseal_exhaust_gaskets.pdf74.66KB

Videos:

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Years Engine Fitment Notes
Buick Commercial Chassis 1994 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Buick Commercial Chassis 1995 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Buick Commercial Chassis 1996 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Buick Roadmaster 1994 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Buick Roadmaster 1995 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Buick Roadmaster 1996 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Cadillac Commercial Chassis 1994 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Cadillac Commercial Chassis 1995 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Cadillac Commercial Chassis 1996 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Cadillac Fleetwood 1994 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Cadillac Fleetwood 1995 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Cadillac Fleetwood 1996 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Camaro 1993 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Camaro 1994 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Camaro 1995 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Camaro 1996 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Caprice 1994 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Caprice 1995 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Caprice 1996 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Corvette 1992 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Corvette 1993 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Corvette 1994 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Corvette 1995 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Corvette 1996 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Impala 1994 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Impala 1995 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Chevrolet Impala 1996 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Pontiac Firebird 1993 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Pontiac Firebird 1994 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Pontiac Firebird 1995 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;
Pontiac Firebird 1996 5.7L / 350 / V8 COPPER SEAL; EXHAUST GASKET SET; D-SHAPED PORT; PORT DIMENSIONS W-1.50 IN. X H-1.50 IN.;

Specifications:

Collector Gaskets Included No
Emission Code 5
Engine Chevrolet Small Block Gen II (LT Based)
Gasket Line Copper-Seal
Material Copper
Part Type Exhaust Manifold Gasket Set
Port Shape D-Port
Port Size 1.40" x 1.40"
Product Type Header Gaskets
Proposition 65 www.P65Warnings.ca.gov
Thickness .094"
Warranty Limited 90 Day Warranty TX, Limited 90 Day Warranty
Weight 0.9400

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