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      06-23-2009, 07:56 PM   #74
Scared money don't make money.
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Drives: 2009 E92 M3 DCT
Join Date: Apr 2009
Location: Irvine, CA

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2009 E92 M3  [0.00]
Originally Posted by J08M3 View Post
no software is necessary for secondary cat delete since o2 senosors are only on primary cats. Make sure to leave the resonators and you will have no drone or rasp sound. just straight pipe is all that's necessary as replacement since resonators already exist farther back from factory.
I deleted my 2nd cats AND resonators and there is ZERO drone. It's really not all that raspy either...only when the exhaust is cold and you rev the engine. Other than that it sounds more like a stock M5/M6.
2009 E92 M3/DCT/Alpine White/Fox Red/Carbon Leather
OE Tuned 402 whp & 303 wtq/Gintani X-pipe/MXP Axle Back/Rogue Pulley/AFE Stage 2/Cosmetics By IND & EAS
HUGE THANKS: Gintani, OE Tuning, and EAS