catalytics

upss · 05-28-2012, 08:21 PM

I just installed my new downpipe and i want to know if i remove the second catalytic make a difference in power. i have a friend and he do it and the sound is not good? thank guys

E90Company · 05-28-2012, 08:23 PM

Itll barely make a difference but it's good to free up the restriction. Probably 3-5whp

benzy89 · 05-28-2012, 09:13 PM

Quote:

Originally Posted by upss

I just installed my new downpipe and i want to know if i remove the second catalytic make a difference in power. i have a friend and he do it and the sound is not good? thank guys

Good for power, but you'll get LOTS of drone. Better off getting DPs (eliminating that 1st set of cats) and keeping the rest of the stock exhaust. Golf-tee mode if you really crave something a little louder.

Lulz_M3 · 05-28-2012, 09:29 PM

I replaced my factory midcats with vibrant resonators and it sounds pretty good. BMW PE and I get no drone, minimal rasp. Power difference isn't enough to feel.

05-28-2012, 08:21 PM	#1
upss Private 4 Rep 62 Posts Drives: 335i 2008 Join Date: Apr 2011 Location: Puerto Rico iTrader: (0)	catalytics I just installed my new downpipe and i want to know if i remove the second catalytic make a difference in power. i have a friend and he do it and the sound is not good? thank guys
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05-28-2012, 08:23 PM	#2
E90Company Major General 195 Rep 6,136 Posts Drives: Car Join Date: Mar 2012 Location: FL iTrader: (2)	Itll barely make a difference but it's good to free up the restriction. Probably 3-5whp
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05-28-2012, 09:29 PM	#4
Lulz_M3 Banned 33 Rep 1,029 Posts Drives: AW 335i 6MT Join Date: Oct 2011 Location: Jax, Fl iTrader: (0)	I replaced my factory midcats with vibrant resonators and it sounds pretty good. BMW PE and I get no drone, minimal rasp. Power difference isn't enough to feel.
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