im lookin for a 4 into 1 competion manifold for my fiesta RS1800, problem is i cant find anywere ive tried lookin in fast ford mag & that but no joy!! so the question i wanna answer 2 is this : will the manifold from say like a focus or other 1800 lumps fit my RS? if not can any 1 tell me were i can but this item from??

 

You dont need a different manifold unless you have 150 bhp + already and can remap the ECU properly to suite. Save your cash.

The reason no one makes a 4 into 1 is probably because it does not suite the engine.