hi I have just had a manifold made and I think it mite not be right but i could be wrong so here is the problem my engine firing order is 1243 and i have a twin entry turbo so i think it should have 1and2 down 1 port of the turbo and 4and 3 down the other ? my new manifold goes 1and 4 down 1 port of the turbo and 2 and 3 down the other is this right or is it not could do with some help please on this as im not to sure that its the way to go thanks Paul

manifold zx12r turbo

[Edited on 1/3/10 by imp paul]

Nope, this is OK, as the "standard" firing order is 1342. Yours is 1243, so cylinders 2 and 3 are swapped round. As long as cylinders that fire 360 degrees apart are grouped together you'll be fine.

woop woop yaaaaaaaaay just had a chat with ray debben and he said yes thank god for that lol thanks for your help above cheers paul