Cometic GM/Mercury Marine 525/625 502 Gen-VI Big Block V8 .040in MLS Cylinder 4.470in Bore HG 4-2-1 CERAMIC HEADER 15mm Extreme Duty Exhaust Valves

15mm Extreme Duty Exhaust Valves (Set of 24)

5 Inch O2 Sensor Extension

1993-1994 Ford Ranger XL 1983-1985 Ford Ranger XLS 1983-1994 Ford Ranger XLT 1983-1988 Ford Thunderbird Turbo 1994 Mazda B2300 Base 1994 Mazda B2300 SE 1983 Mercury Capri Black Magic 1983 Mercury Capri Crimson Cat 1983-1984 Mercury Capri GS 1983 Mercury Capri L 1984 Mercury Capri RS Turbo 1984-1986 Mercury Cougar XR-7 1985-1989 Merkur XR4Ti Base

5L with aFe's Mach Force Xp exhaust system

Cometic GM/Mercury Marine 525/625 502 Gen-VI Big Block V8 .040in MLS Cylinder 4.470in Bore HG 4-2-1 CERAMIC HEADER 15mm Extreme Duty Exhaust ValvesComprised 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