Originally Posted by
H5606
Great info. Thanks on that CP. I went so far as to ask to include the Jett mufflers taking for granted a review on the engine at HH's site but discovered hole spacing too narrow - bummer - should have chk'd specs first.
Instructions only acknowledge tuned exhaust systems.
Would Mac's be a good source for header and pipe? Equivalent recommendations for their H-9 #3 or #9 performance plugs?
Yes, MACs products and service is outstanding.
For plugs, I like to use the cheapest ones like FOX or K&B. If the compression is set too high or the mixture too lean, you can obliterate an expensive plug just as easily as a cheap one.
The absolute best value are Nelson plugs but they use a special 11/32" thread with a tapered seat like AN fittings have. Might as well not bring them up unless you are a machinist or want to have a machinist modify a Evo head.