Originally Posted by msheredy
The Arizona company Floored Fabrication discovered that the oem manifolds actually shroud the exhaust ports. This is never a good thing for flow.
Well if this is indeed the case, and because of their stainless steel construction, we can't port match or hone em out, then headers would most assuredly be the way to go. There should be a very noticeable H.P. increase too I would think.
Now if somebody can just fabricate a set that didn't cost an arm and a leg, this would probably be one of the best performance bargains for a Limited and Base engine.