52mm throttle body
when my car was a full bolt on a4, i only gained 1 mph thru the traps by changing from stock to a 42mm bbk. & not much, if any e.t. reduction. decide for yourself, 1st price, 2nd future mods. wasn't worth it to me. decide for yourself, how far you wanna go. probly depends on goals & income combined.
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oldschool
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Feb 9, 2016 09:21 PM



