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      12-19-2012, 06:04 AM   #6
ErvGotti
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Drives: 2008 135i 6MT
Join Date: Jul 2010
Location: Aviano

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2008 135i  [6.00]
Quote:
Originally Posted by ParkNuts View Post
It's not pointless to put on a catless downpipe. I think Vishnu claims like 10-15 at the wheels untuned. I have the catted version on my car and it reduces spool time. Besides, it sounds wicked. I didn't necessarily want to tune my car yet and I like the exhaust tone. Aside from the cel light I haven't seen any downsides.
Have you Dyno'd it? Have you done a Vbox pull or 1/4 mile pull between stock and modded. A lot of manufactures claim gains to sell products. If you search around the forums you'll see that there is no gains to be had unless your tuned. Especially an intake.

You might gain a split second of spool up with catted DP's vs stock and better sound but I can guarantee you, you are not gaining 10-15 WHP without a tune.
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