Quote:
Originally Posted by Jumbosock
I think some E46M3 guys were losing HP with no cats because of the oem cam overlap. I'm assuming stock cams here.
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I'd guess its possible if you're running a high flow x-pipe and straight through mufflers too (Like eisemann race or RPI). If there's enough backpressure after the section 1, SUPERCHARGED cars should pick up 20rwhp or so
Please see if you can find more info, on the cars that lost power