Has anyone done a dyno back to back comparing tuned car with hfc intake and exhaust than same mods and the headers?
I have these headers but a shop I go to is saying there's a good chance I lose mid range tq having full bolt ons already..
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09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)
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