what do u guys think about this setup ?

mr.ba6o0o6 · 06-03-2009, 10:36 PM

I have a 09 e92 dct , jb3 , injen CAI and AR DP
i've been thinking about having a custom exhaust , by removing the secondary cats , and having a magnaflow straight thru muffler instead of the oem mufflers
what do u guys think about that ? , will the loss of backpressure be a hp adder or the other way ? , this is my first FI car , so please excuse my lack of knowledge

or should i just leave my secondary cats and do the muffler delete ?

Thanks Alot !
Mohamed

Donald-335i · 06-03-2009, 11:17 PM

i say go for it bro...

BTW Turbo Cars Less Backpressure = More HP!!!!!

MFKN3 · 06-03-2009, 11:18 PM

I had an aftermarket exhaust installed from factory dp's back. They deleted the resonator and secondary cats and put in a small muffler before each tip. Sounds good too and no drone

mr.ba6o0o6 · 06-03-2009, 11:19 PM

Quote:

Originally Posted by Donald-335i

i say go for it bro...

BTW Turbo Cars Less Backpressure = More HP!!!!!

that's what i though but wasn't sure , so i asked the best

Thanks , hopefully i'll get to do it this week

e92man · 06-03-2009, 11:25 PM

Sounds good to me!

rcracer_tx · 06-03-2009, 11:29 PM

If you want a louder car go for it, but taking the secondary cats off of this car has shown no gains or 2-3whp... The catted midpipes don't add a significant amount of backpressure at the power the stock turbos can sustain, so if you want a better sound I would get an axleback system because having the smell of being catless and the same gains as going catless...

addicted2drums · 06-03-2009, 11:32 PM

Quote:

Originally Posted by Donald-335i

i say go for it bro...

BTW Turbo Cars Less Backpressure = More HP!!!!!

+1

06-03-2009, 10:36 PM	#1
mr.ba6o0o6 raceoholik 9 Rep 67 Posts Drives: 09 e92 335i DCT Join Date: Jan 2009 Location: kuwait iTrader: (1)	what do u guys think about this setup ? I have a 09 e92 dct , jb3 , injen CAI and AR DP i've been thinking about having a custom exhaust , by removing the secondary cats , and having a magnaflow straight thru muffler instead of the oem mufflers what do u guys think about that ? , will the loss of backpressure be a hp adder or the other way ? , this is my first FI car , so please excuse my lack of knowledge or should i just leave my secondary cats and do the muffler delete ? Thanks Alot ! Mohamed
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06-03-2009, 11:17 PM	#2
Donald-335i Banned 191 Rep 3,588 Posts Drives: The Hoes Crazy! Join Date: Nov 2008 Location: Central NJ iTrader: (13)	i say go for it bro... BTW Turbo Cars Less Backpressure = More HP!!!!!
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06-03-2009, 11:18 PM	#3
MFKN3 Colonel 127 Rep 2,224 Posts Drives: supercharged 4.4L stroker E92 Join Date: Nov 2008 Location: Australia iTrader: (2)	I had an aftermarket exhaust installed from factory dp's back. They deleted the resonator and secondary cats and put in a small muffler before each tip. Sounds good too and no drone
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06-03-2009, 11:25 PM	#5
e92man Lieutenant Colonel 57 Rep 1,719 Posts Drives: modded e92 335i coupe Join Date: Jun 2007 Location: north florida iTrader: (0) Garage List 2007 e92 335i coupe [0.00]	Sounds good to me! __________________ e92 335i jet black, coral red, aluminum, sport, step, paddles, heated seats, pdc, bmw aluminum pedals, oem aero kit front lip, 19' miro type 366 hamann race edition reps, H&R sport springs, 15% tints, vorsteiner rear deck spoiler, custom front pdc "The only cars that should be yellow are taxi cabs and school busses."
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06-03-2009, 11:29 PM	#6
rcracer_tx Banned 55 Rep 2,013 Posts Drives: BSM 135i Join Date: Apr 2008 Location: Texas iTrader: (0)	If you want a louder car go for it, but taking the secondary cats off of this car has shown no gains or 2-3whp... The catted midpipes don't add a significant amount of backpressure at the power the stock turbos can sustain, so if you want a better sound I would get an axleback system because having the smell of being catless and the same gains as going catless...
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