View our Specials! Coupon Code: SaveIn2026
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.
 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 $70.39 |
 IN STOCK - LOW C5299-018A chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core... Cometic Gen 1 Chevrolet V6 4.3L / AFM Gen 1 Small Block V8 .018in Water Pump Mounting Gasket 1980-1980 Avanti II Base $25.94 CLEARANCE VIEW PRICE IN CART |
 IN STOCK - LOW C5389-032A chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core... Cometic Chevy/Dodge/Ford .032in AFM Fuel Pump to Block Gasket 1980-1985 Avanti II Base 1985-1985 Avanti II GT $26.92 CLEARANCE VIEW PRICE IN CART |
 SHIPS FROM MANUFACTURER CP15281A chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core... Cometic GM LS Gen-3/4 Rear Main Seal Cover Gasket - 10 Pack 2001-2004 Avanti II Base $231.81 |
 SHIPS FROM MANUFACTURER C5435Includes all Gaskets, O-Rings, Seals, Etc Needed for a Cam Change... Cometic Chevrolet Gen-1 Small Block V8 Camshaft Seal - Jesel Belt Drive - 86586 1980-1985 Avanti II Base 1985-1985 Avanti II GT $81.72 |
 SHIPS FROM MANUFACTURER C5085Cometic GM 3.2/3.8/4.1/4.8L Inline 6 3.8/4.3L V6 Chevy Gen1 SB V8 Silicone Rear Main Seal-2 Piece 1980-1985 Avanti II Base 1985-1985 Avanti II GT $44.66 |
SHIPS FROM MANUFACTURER C5106Cometic Chevrolet Gen-1 90 Degree V6 - Gen-1/2 Small Block V8 Rear Main Seal Kit - 1 Piece 1980-1985 Avanti II Base 1985-1985 Avanti II GT $56.41 |
SHIPS FROM MANUFACTURER C5681Cometic Chevy 1955-1985 Gen1 Small Block V8 Rear Main Seal-Align Honed 400 & Aluminum Block-2 Piece 1980-1985 Avanti II Base 1985-1985 Avanti II GT $59.00 |
 SHIPS FROM MANUFACTURER C15251A chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core... Cometic GM TH700-R4/4L60-E .060in AFM Transmission Oil Pan Gasket 1987-1991 Avanti II Base 2001-2004 Avanti II Base $48.70 |
 SHIPS FROM MANUFACTURER C15254A chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core... Cometic GM Turbo 350 .075in AFM Transmission Oil Pan Gasket 1980-1985 Avanti II Base 1985-1985 Avanti II GT $48.70 |
 SHIPS FROM MANUFACTURER C15546Cometic Chevrolet Gen-1 Small Block V8 Oil Pan Gasket- One Piece Molded Rubber 1969-1974 Avanti II Base 1976-1985 Avanti II Base 1985-1985 Avanti II GT $63.58 |
SHIPS FROM MANUFACTURER C5072Cometic 86-97 GM Small Block V8 1pc Rubber Oil Pan Gasket 1987-1991 Avanti II Base $67.51 |
IN STOCK C5173Cometic GM Gen-3/4 Small Block V8 Oil Pan Gasket - Except LS1/LS6 Corvette: Upper to Block 2001-2004 Avanti II Base $49.42 |
 SHIPS FROM MANUFACTURER C5294Fully cured nitrile butadiene rubber binder for maximum fluid resistance... Cometic Chevy Gen1 Small Block V8 .094in Fiber Oil Pan Gskt Kit-Right Side Dipstick-Thick Front Seal 1980-1985 Avanti II Base 1985-1985 Avanti II GT $59.74 |
 SHIPS FROM MANUFACTURER C5294-075AFMA chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core... Cometic Chevy Gen1 Small Block V8 .075in AFM Oil Pan Gasket Kit-Right Side Dipstick-Thick Front Seal 1980-1985 Avanti II Base 1985-1985 Avanti II GT $55.58 |
SHIPS FROM MANUFACTURER C5294-NDSCometic Chevrolet Gen-1 Small Block V8 Oil Pan Gasket Kit - No Dipstick Hole - Thick Front Seal 1980-1980 Avanti II Base $63.72 |
 SHIPS FROM MANUFACTURER C5295-031Fully cured nitrile butadiene rubber binder for maximum fluid resistance... Cometic Chevy Gen1 SB V8 .031in Fiber Oil Pan Gasket Kit-Left Side Dipstick-Thick & Thin Front Seals 1969-1974 Avanti II Base 1976-1979 Avanti II Base $61.13 |
 SHIPS FROM MANUFACTURER C5295-060AFMA chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core... Cometic Chevy Gen1 Small Block V8 .060in AFM Oil Pan Gasket Kit-Left Side Dipstick 1969-1974 Avanti II Base 1976-1979 Avanti II Base $63.72 |
 SHIPS FROM MANUFACTURER C5295-075A chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core... Cometic Chevy Gen1 SB V8 .075in AFM Oil Pan Gasket Kit-Left Side Dipstick-Thick & Thin Front Seals 1969-1974 Avanti II Base 1976-1979 Avanti II Base $55.58 |
 SHIPS FROM MANUFACTURER C5295-094Fully cured nitrile butadiene rubber binder for maximum fluid resistance... 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 $59.74 |
 SHIPS FROM MANUFACTURER C5296Fully cured nitrile butadiene rubber binder for maximum fluid resistance... Cometic Chevrolet Gen-1 Small Block V8 .094i Fiber Oil Pan Gasket Kit Right Side Dipstick Thin Front 1980-1985 Avanti II Base 1985-1985 Avanti II GT $62.01 |
SHIPS FROM MANUFACTURER C5488Cometic Chevy Gen1 SB V8 Oil Pan Gasket Kit-Left Side Dipstick 1980-1985 Avanti II Base 1985-1985 Avanti II GT 1987-1991 Avanti II Base $55.24 |
SHIPS FROM MANUFACTURER C5488-060Cometic Chevy Gen1 SB V8 .060in Oil Pan Gasket Kit-Left Side Dipstick 1980-1985 Avanti II Base 1985-1985 Avanti II GT 1987-1991 Avanti II Base $62.96 |
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 $305.24 |
 SHIPS FROM MANUFACTURER PRO1003BCometic Street Pro Kits are geared toward the street rider who is looking to purchase a kit with all necessary gaskets and seals needed for your rebuild.... 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 $104.43 |