Challenge Race or Sport x-pipes

Jbrown26 · 11-01-2017, 10:18 AM

I plan on purchasing an Eisenmann Race axle back w/ Challenge Race x-pipes, but I keep hearing it will make my car smell like gas really bad. Is it really that bad when you are catless? I just want to obtain the most power possible. What is the power difference between the Challenge Race and Sport x-pipes? Thanks!

6ixSpd · 11-01-2017, 11:27 AM

I've always said that going fully catless vs. a pair of high flow cats is not worth the cons whatsoever. The smell is very strong behind the car, and wafts into the cabin is well. The power gains are minimal and unnoticeable, you'd be better off losing a couple pounds off yourself, lol

Added carcinogens vs. 2-3whp? I know what decision I'd make every time.

Jbrown26 · 11-01-2017, 11:34 AM

Think I'll go with the sport then lol

M43S7RO · 11-01-2017, 01:32 PM

Highly subjective IMO. I am fully catless and I really only notice in an enclosed area.

L4ces · 11-01-2017, 07:59 PM

It is subjective, I can't smell carbon monoxide but hey just keep the windows open

11-01-2017, 10:18 AM	#1
Jbrown26 New Member 6 Rep 21 Posts Drives: 2011 M3 DCT \| ESS VT-1 550 SC Join Date: Oct 2017 Location: Dallas iTrader: (0)	Challenge Race or Sport x-pipes I plan on purchasing an Eisenmann Race axle back w/ Challenge Race x-pipes, but I keep hearing it will make my car smell like gas really bad. Is it really that bad when you are catless? I just want to obtain the most power possible. What is the power difference between the Challenge Race and Sport x-pipes? Thanks!
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11-01-2017, 11:27 AM	#2
6ixSpd Save the manuals! 6272 Rep 6,848 Posts Drives: '12 M3, '19 X5, '23 718 Spyder Join Date: Feb 2016 Location: 416 iTrader: (4)	I've always said that going fully catless vs. a pair of high flow cats is not worth the cons whatsoever. The smell is very strong behind the car, and wafts into the cabin is well. The power gains are minimal and unnoticeable, you'd be better off losing a couple pounds off yourself, lol Added carcinogens vs. 2-3whp? I know what decision I'd make every time.
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11-01-2017, 11:34 AM	#3
Jbrown26 New Member 6 Rep 21 Posts Drives: 2011 M3 DCT \| ESS VT-1 550 SC Join Date: Oct 2017 Location: Dallas iTrader: (0)	Think I'll go with the sport then lol
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11-01-2017, 01:32 PM	#4
M43S7RO Major 517 Rep 1,067 Posts Drives: Jerez Black E92 M3 Join Date: Sep 2015 Location: Peoria, AZ iTrader: (13)	Highly subjective IMO. I am fully catless and I really only notice in an enclosed area. __________________ aFe Stage 2 Intake \| BW Race X-Pipe \| UUC Corsa Exhaust \| Alpine MS Tune \| Brembo GT
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11-01-2017, 07:59 PM	#5
L4ces Major 362 Rep 1,492 Posts Drives: 2008 E92 M3 Alpine White Join Date: Aug 2010 Location: NJ - NY iTrader: (0) Garage List 2008 M3 [0.00]	It is subjective, I can't smell carbon monoxide but hey just keep the windows open
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