Looking for aftermarket parts to modify or upgrade your Avanti II with gasket kits? At Tunersports.com we carry a huge selection of the top name brand performance gasket kit parts and accessories for your II.
Whether you have a 1965 or 2004 Avanti II in Base to GT trim we have you covered. We have 27 gasket kits available to mod your II. All parts have free shipping to the Continental US 48 States.
 IN STOCK - LOW 1404These BBK Premium Quality Exhaust Header Gasket Sets Are Designed To Give You a Quality Long Lasting Seal. Will Work On Most Stock Or Aftermarket Exhaust Header Applications... BBK GM LS1 4.8 5.3 5.7 6.0 6.2 Exhaust Header Gasket Set 2001-2004 Avanti II Base $62.58 |
 IN STOCK - LOW C5299-018COMETIC Water Pump Gaskets are made to meet and exceed OEM quality. Custom materials and thicknesses are available.... Cometic Gen 1 Chevrolet V6 4.3L / AFM Gen 1 Small Block V8 .018in Water Pump Mounting Gasket 1980-1980 Avanti II Base $22.61 |
 IN STOCK - LOW C5389-032COMETIC Aluminum Foamet Material is a Nitrile foam rubber bonded to an aluminum core to create a rigid gasket with great compressibility.... Cometic Chevy/Dodge/Ford .032in AFM Fuel Pump to Block Gasket 1980-1985 Avanti II Base 1985-1985 Avanti II GT 1987-1991 Avanti II Base $23.54 |
 SHIPS FROM MANUFACTURER CP15281Cometic GM LS Gen-3/4 Rear Main Seal Cover Gasket - 10 Pack 2001-2004 Avanti II Base $220.77 |
 SHIPS FROM MANUFACTURER C15546Cometic Chevrolet Gen-1 Small Block V8 Oil Pan Gasket- One Piece Molded Rubber 1965-1974 Avanti II Base 1976-1985 Avanti II Base 1985-1985 Avanti II GT $58.77 |
 SHIPS FROM MANUFACTURER C5072Today's lightweight engines are producing more horsepower, higher cylinder pressures, clamp loads and extreme temperatures. Our commitment is to provide innovative, quality gaskets while maximizing your engine's power and performance. Cometic's gaskets are proudly made in the USA with materials manu... Cometic 86-97 GM Small Block V8 1pc Rubber Oil Pan Gasket 1987-1991 Avanti II Base $62.50 |
 SHIPS FROM MANUFACTURER C5295-094COMETIC Oil Pan Gasket sets include high quality oil pan rail gaskets and/or end seals and are designed to seal the oil pan to engine block.... Cometic Chevy Gen1 Small Block V8 .094in Fiber Oil Pan Gasket Kit Left Side Thick & Thin Front Seals 1965-1974 Avanti II Base 1976-1979 Avanti II Base $55.11 |
 SHIPS FROM MANUFACTURER CP5173Cometic GM LS Gen-3/4 Small Block V8 Oil Pan Gasket (Except LS1/LS6 Corvette) - 10 Pack 2001-2004 Avanti II Base $290.70 |
 SHIPS FROM MANUFACTURER PRO1003BCOMETIC StreetPro Kits cater to the budget-minded street-rodder who is looking to purchase a kit with all necessary gaskets and seals needed for their rebuild. Quality gasket materials are a priority in StreetPro kits. Kit materials include: MLS, AFM, Aramid Fiber, and Armor Clad.... Cometic Street Pro GM 1967-88 350ci 1970-76 400ci Small Block Bottom End Gasket Kit 1969-1974 Avanti II Base 1976-1980 Avanti II Base $97.68 |
 SHIPS FROM MANUFACTURER PRO1003TCOMETIC StreetPro Kits cater to the budget-minded street-rodder who is looking to purchase a kit with all necessary gaskets and seals needed for their rebuild. Quality gasket materials are a priority in StreetPro kits. Kit materials include: MLS, AFM, Aramid Fiber, and Armor Clad.... Cometic Street Pro GM 1967-88 350ci 1970-76 400ci 4.165 Small Block Top End Gasket Kit 1969-1974 Avanti II Base 1976-1980 Avanti II Base $249.89 |
 SHIPS FROM MANUFACTURER PRO1007TCOMETIC StreetPro Kits cater to the budget-minded street-rodder who is looking to purchase a kit with all necessary gaskets and seals needed for their rebuild. Quality gasket materials are a priority in StreetPro kits. Kit materials include: MLS, AFM, Aramid Fiber, and Armor Clad.... Cometic Street Pro GM 1997-05 5.7L LS Series Gen III 4.100 Small Block Top End Gasket Kit 2001-2004 Avanti II Base $249.89 |
 IN STOCK - LOW PRO1040BCometic Street Pro 99-07 GM LS 4.8L/5.3L/5.7L/6.0L Bottom End Kit 2001-2004 Avanti II Base $172.75 |
 IN STOCK - LOW C5538-047Materials, manufacturing processes and gasket designs are constantly improving to match the higher level of performance for todays powerful engines. When purchasing a Cometic gasket kit, you can rest assured that every component will be the best solution for your application. Cometic Gasket Kits inc... Cometic Chevrolet Gen-1 Small Block V8 .047in Fiber Thermostat Gasket 1980-1985 Avanti II Base 1985-1985 Avanti II GT 1987-1991 Avanti II Base $22.99 |
 SHIPS FROM MANUFACTURER C5574-018COMETIC Thermostat Gaskets are made to meet and exceed OEM quality. Custom materials and thicknesses are available.... Cometic GM/Ford/Chrysler/Dodge .018in AFM Thermostat Housing Gasket 1980-1985 Avanti II Base 1985-1985 Avanti II GT 1987-1991 Avanti II Base $29.58 |
 SHIPS FROM MANUFACTURER C5056Today's lightweight engines are producing more horsepower, higher cylinder pressures, clamp loads and extreme temperatures. Our commitment is to provide innovative, quality gaskets while maximizing your engine's power and performance. Cometic's gaskets are proudly made in the USA with materials manu... Cometic 98-11 GM Small Block LS V8 Timing Cover Gasket Set 2001-2004 Avanti II Base $62.90 |
 SHIPS FROM MANUFACTURER C5376COMETIC Front and Rear Main Crank Seals are manufactured from the best materials available and are suited for all types of environments. Each seal meets or exceeds OEM quality. For Jesel Belt Drive. Ok for wet or dry sump systems... Cometic Chevy Gen 1 Small Block V8 Timing Cover Seal Jesel Belt Drive Dual Lip, Wet & Dry Sump 86587 1980-1985 Avanti II Base 1985-1985 Avanti II GT $71.81 |
 SHIPS FROM MANUFACTURER C5378COMETIC Front and Rear Main Crank Seals are manufactured from the best materials available and are suited for all types of environments. Each seal meets or exceeds OEM quality. Ok for wet or dry sump systems... Cometic Chevy Gen 1 Small Block V8 Timing Cover Seal Dual Lip Wet & Dry Sump 86690 1980-1985 Avanti II Base 1985-1985 Avanti II GT $100.36 |
 SHIPS FROM MANUFACTURER C5379COMETIC Front and Rear Main Crank Seals are manufactured from the best materials available and are suited for all types of environments. Each seal meets or exceeds OEM quality. Ok for wet or dry sump systems... Cometic Chevy Gen 1 Small Block V8 Rear Main Seal Dual Lip Wet & Dry Sump 86625 1980-1985 Avanti II Base 1985-1985 Avanti II GT $100.30 |
 SHIPS FROM MANUFACTURER C5530COMETIC Timing Cover Gasket sets include high quality timing cover gasket and seal and are designed to seal the timing cover to engine block.... Cometic Chevrolet Gen-1 Small Block V8 Timing Cover Gasket Kit - Front Cover - 0.31in 1980-1985 Avanti II Base 1985-1985 Avanti II GT $46.53 |
 SHIPS FROM MANUFACTURER CP15280Cometic GM LS Gen. 3/4 Timing Cover Gasket (10 Pack) 2001-2004 Avanti II Base $169.91 |
 SHIPS FROM MANUFACTURER 12371The Edelbrock #12371 kit includes the primary fuel bowl gasket, the primary metering block gasket, the secondary metering block gasket and a metering plate gasket. The Edelbrock #12371 fits Holley 4160 carburetors.... Edelbrock Gaskets Metering Block Assortment for 4160 1980-1985 Avanti II Base 1985-1985 Avanti II GT 1987-1991 Avanti II Base $48.79 |
 SHIPS FROM MANUFACTURER 12380The Edelbrock #12380 Metering Block gasket is made of black nitrile material and will ensure a leak-free seal from your carb to the metering block. The Edelbrock #12380 Metering Block gasket will fit 4150 &4160 carburetors. These will not work with accelerator pump transfer tubes.... Edelbrock Gaskets Metering Block for 4150 and 4160 Quantity -2 1980-1985 Avanti II Base 1985-1985 Avanti II GT 1987-1991 Avanti II Base $46.83 |
 SHIPS FROM MANUFACTURER 12382The Edelbrock #12382 fuel bowl gasket is designed for Holley 2300, 4150, 4160, 4175 and 4500 carburetors. Kit includes two black nitrile fuel bowl gaskets.... Edelbrock Gaskets Fuel Bowl for 2300 4150 4160 4175 and 4500 Series Quantity -2 1980-1985 Avanti II Base 1985-1985 Avanti II GT 1987-1991 Avanti II Base $43.80 |
 SHIPS FROM MANUFACTURER 12410The Edelbrock Heat Insulator #12410 is a replacement base plate gasket for a 4-barrel, square bore carbs. Gasket is 5/16" thick and will fit carbs with 1-3/4" square bores. The Edelbrock #12410 kit includes gasket, studs and nuts.... Edelbrock Carb Mounting Gasket Kit w/ Studs 1980-1985 Avanti II Base 1985-1985 Avanti II GT 1987-1991 Avanti II Base $60.93 |
 SHIPS FROM MANUFACTURER 12600These needle and seat assemblies will fit carburetors with center hung fuel bowls and can be used as replacements or performance upgrades. Kit includes needle and seat assembly, two gaskets and oneO-ring. For use with Holley 2300, 4150, 4160, 4165, 4175 and 4500 Series, Quick Fuel 4500, Professional... Edelbrock Hardware Kit Needle And Seat Assembly Two Gaskets And One O-Ring 1980-1985 Avanti II Base 1985-1985 Avanti II GT 1987-1991 Avanti II Base $42.85 |