Which catted DP-back exhaust dynos the best?

Slidewayz · 03-19-2009, 02:50 PM

Sorry if this is out there & I didn't

well enough!

Which aftermarket DP-back exhaust WITH CATS flows the best as proven by dynos?

Slidewayz · 03-21-2009, 12:18 AM

Um, does this mean no one knows???

JB335 · 03-21-2009, 01:40 AM

There are so many different variables in dyno testing that I don't think there is a legitimate conclusion to this question. Until we get the same person swapping exhausts on the same car, in the same day, and somehow, at the same temps, there is no definitive answer.

On a lightly modified car all gains are extremely similar. Choose by your eyes, ears, and wallet.

luca335i · 03-21-2009, 01:48 AM

Usually people go with axleback when choosing to keep their secondary cats. I'd go with bastuck, Remus , or eisenmann if you have the $$$$.

stillclaimndp · 03-21-2009, 04:56 AM

True, no one has taken the time to switch through multiple cat backs on the same dyno, same day, and no one knows... The catback is only as good as the downpipes on a turbo car though other than in the high revs you aren't gonna see much difference.

03-19-2009, 02:50 PM	#1
Slidewayz Major 38 Rep 1,177 Posts Drives: 2007 335i Join Date: Jan 2009 Location: Oakland, CA iTrader: (5)	Which catted DP-back exhaust dynos the best? Sorry if this is out there & I didn't well enough! Which aftermarket DP-back exhaust WITH CATS flows the best as proven by dynos?
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03-21-2009, 12:18 AM	#2
Slidewayz Major 38 Rep 1,177 Posts Drives: 2007 335i Join Date: Jan 2009 Location: Oakland, CA iTrader: (5)	Um, does this mean no one knows???
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03-21-2009, 01:40 AM	#3
JB335 Banned 34 Rep 1,034 Posts Drives: 335is Join Date: Aug 2008 Location: so cal iTrader: (1) Garage List 2011 BMW 335IS [7.60]	There are so many different variables in dyno testing that I don't think there is a legitimate conclusion to this question. Until we get the same person swapping exhausts on the same car, in the same day, and somehow, at the same temps, there is no definitive answer. On a lightly modified car all gains are extremely similar. Choose by your eyes, ears, and wallet.
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03-21-2009, 01:48 AM	#4
luca335i Major 67 Rep 1,193 Posts Drives: 335I Sedan Join Date: Jan 2008 Location: Unknown iTrader: (3)	Usually people go with axleback when choosing to keep their secondary cats. I'd go with bastuck, Remus , or eisenmann if you have the $$$$.
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03-21-2009, 04:56 AM	#5
stillclaimndp Dancing Machine 50 Rep 1,419 Posts Drives: 335i e90 ZSP Join Date: Aug 2007 Location: Walnut Creek, Ca iTrader: (0)	True, no one has taken the time to switch through multiple cat backs on the same dyno, same day, and no one knows... The catback is only as good as the downpipes on a turbo car though other than in the high revs you aren't gonna see much difference. __________________ 2007 e90 & 1981 Corvette Predecessors: 2007 BMW 335i E92, 2006 M5, 2008 Viper SRT10 Coupe, 2005 Viper Yellow, 2006 Corvette Z51, 2009 Challenger SRT8, 2006 S4, 2001.5 Nogaro Blue S4, 2006 GTI w/ DSG, 06 Evo IX, 04 S4, 04 911x51, 03 Evo VIII, 98 Eclipse GSX, 96 GST, 92 Galant Vr-4, '70 Grand Prix Model J, '70 Nova, '68 Firebird
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