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Duffman · 11-25-2008, 11:37 PM

The rule that I have seen is you dont run an engine without the exhaust manifold(s) or it will warp the valves. Just running a bigger pipe post manifold is not going to do it.

11-25-2008, 11:37 PM	#3 (permalink)
Duffman Master EcoModder Join Date: Mar 2008 Location: Edmonton, AB, Canada Posts: 531 Thanks: 11 Thanked 12 Times in 11 Posts	The rule that I have seen is you dont run an engine without the exhaust manifold(s) or it will warp the valves. Just running a bigger pipe post manifold is not going to do it.