Cosworth YB | Sierra | Escort | All Models | Universal Head Set - Both Rockers


MAR Motorsport Gaskets and Seals are sourced from world leading OEM suppliers. This ensures the part always fits and performs as well as the original.
We source these parts in bulk, so often there is no external packing which only adds to the cost of the product. Original Equipment Quality for popular and hard to find parts at competetive pricing.


Please contact us if you are unsure if this is the correct part

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Engine Fitment

Make Engine Code
Ford N5B
Ford N5C
Ford N5D
Ford N5F
Ford YBB
Ford YBD
Ford YBG
Ford YBJ

Vehicle Fitment

Make Model Year Power / Engine
Ford Escort MK 5 RS Cosworth Small Turbo 1992-1994 N5F - 220HP
Ford Escort MK 6 RS Cosworth Large Turbo 1994-1996 N5F - 220HP
Ford Sierra MK 1 2.0 4x4 1982-1986 N5B - 204HP
Ford Sierra MK 1 2.0 4x4 1982-1986 YBB - 204HP
Ford Sierra RS Cosworth 1986-1987 N5B - 204HP
Ford Sierra RS Cosworth 1986-1987 YBB - 204HP
Ford Sierra RS Cosworth 1988-1989 N5B - 204HP
Ford Sierra RS Cosworth 1988-1989 YBB - 204HP
Ford Sierra RS Cosworth 4x4 1990-1993 N5D - 215HP
Ford Sierra RS Cosworth 4x4 1990-1993 YBJ - 215HP
Ford Sierra RS Cosworth Cat 4x4 1990-1993 N5C - 220HP
Ford Sierra RS Cosworth Cat 4x4 1990-1993 YBG - 220HP
Ford Sierra RS500 Cosworth 1987-1987 YBD - 227HP

Additional Information

Weight 0.1 kg
Part Type Head Gasket Set
OE Reference 1 663 025 | 1663025
Notes Fibre gaskets both rocker covers inc
Standard Or Performance? Standard