Why Are DPs Best With Stock Exhaust?

hl0m4n · 03-04-2008, 09:36 AM

ive read somewhere around here that catless dps are best used with the stock exhaust. why is that? for those with exhaust is it best to use with cat or something? maybe because of the larger piping on the exhaust?

retrodrive · 03-04-2008, 09:38 AM

Otherwisw they sound extrimely loud. At least one set of cats on stock piping would make the car a little quieter.

hl0m4n · 03-04-2008, 09:56 AM

Quote:

Originally Posted by retrodrive

Otherwisw they sound extrimely loud. At least one set of cats on stock piping would make the car a little quieter.

o thats it? jeez i thought there was something wrong with performance numbers or something lol. thanks man.

retrodrive · 03-04-2008, 09:58 AM

Yep, its all about the sound. The less restriction you have in your exhaust the better. At least for a turbocharged car.

03-04-2008, 09:36 AM	#1
hl0m4n Major General 2159 Rep 5,623 Posts Drives: BMW Join Date: Nov 2006 Location: NY iTrader: (58)	Why Are DPs Best With Stock Exhaust? ive read somewhere around here that catless dps are best used with the stock exhaust. why is that? for those with exhaust is it best to use with cat or something? maybe because of the larger piping on the exhaust?
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03-04-2008, 09:38 AM	#2
retrodrive Lieutenant Colonel 150 Rep 1,938 Posts Drives: 335i Join Date: Jan 2007 Location: Irvine, CA iTrader: (8)	Otherwisw they sound extrimely loud. At least one set of cats on stock piping would make the car a little quieter.
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03-04-2008, 09:58 AM	#4
retrodrive Lieutenant Colonel 150 Rep 1,938 Posts Drives: 335i Join Date: Jan 2007 Location: Irvine, CA iTrader: (8)	Yep, its all about the sound. The less restriction you have in your exhaust the better. At least for a turbocharged car.
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