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      09-23-2012, 03:37 AM   #4
DJ Apex
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Drives: 2006 330i
Join Date: Nov 2010
Location: Houston TX

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Muffler delete- can cause issues with backpressure and the car is NA.

Yes muffler deletes have been proven to lose power in our cars. so i wouldnt do it.

Cat delete- can cause issues when the car starts heating up.

2nd cats can be deleted with out any issues.

Res Delete-code issues?!

Res delete will not cause any code issues.


If you wanted more sound ide delete the 2ndary cats and see how u like it.
cause in my option when i deleted the RES i noticed jack poo in sound.

I got a amazing exhaust guy who dose all my work for cheap.