I've just bought a second hand 4x4 exhaust manifold to fit onto my 2wd engine. For some reason it doesn't fit! I have held it up against the 2wd manifold and the stud pattern, especially around the smaller centre holes, is different. Around 2-3 mm different. The part No. on the 4x4 one is YB0625/02. According to the Cosworth parts list the part no. should be YB0625 so what does the /02 mean? I have had the head head helicoiled in two or three places, and fitted brand new studs, and still the 2wd manifold fits like a glove. Any help will be greatly received,
Ryan