My limited understanding from the research I did before making my first one is that the protruding stacks aren't good for flow when the plenum is presurised.
This comes from the compressed air building up under and around the base of the stack and disrupting the flow.
JDub touched on the...
Right up till the car cooks in summer traffic anneals the head and totally fucks itself......
Then you can tell people how you picked up maybe 5hp at most after you factor in the extra drag on the alternator to run the electric fan.. :nono:
Look at AJ's mods if you have less than him you have less than 215rwhp ;)
(it's NOT as easy as some are making out as the 7M is fairly highly tuned to begin with)
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