Spacing exhaust manifolds

[s1.5f]

How detrimental to breathing would it be to put a thin 3-5mm spacer (with obviously 2 gaskets) between the head and exhaust manifold. The engine is a V6 and this mod only needs to be done on 1 side as well... will this cause a whole heap of trouble?!

It would basically be a cheat to get my old ss manifolds to fit a newer increased capacity engine which has a bigger crank pulley that just fouls the n/s downpipe.

[eliot]

Dont see an issue with that. Just make sure you fit longer bolts, or you WILL strip your threads out.

[stevieturbo]

Cant see any problems at all with that...

[GreenV8S]

Can't you just file a flat on the crank pulley?

Sorry, I'm just having one of those days ...

[denisb]

What miniscule amount you'll lose in one place you'll gain in another so don't worry about it.

[s1.5f]

GreenV8S said:

Can't you just file a flat on the crank pulley? Sorry, I'm just having one of those days ...

[s1.5f]

Thanks guys, I guess I was mainly concerned about all the extra bumps and joins the gas would have to travel over but sounds like its going to be such a small issue I won't worry...

[Boosted LS1]

It would be better if you fitted studs instead of bolts