Secondary cats delete

N54bimmer · 02-24-2014, 08:16 PM

Just wondering if anyone has any experience with a secondary cat delete on a stock exhaust. I read a few threads, but wanted more opinions, how much of an affect does it have on sound?

NOTM3 · 02-25-2014, 01:09 AM

its not a huge difference in sound

bmwm3redblack · 02-25-2014, 04:55 AM

I've done mine deleted,and very happy for now, the sound is louderand more distinct.
There is a slight drone between 1500-1800 rpm. But in general I 'm allright with it.

Btw I ve gotcatless dp's aswell!!!

HighPSI · 02-25-2014, 08:36 AM

If you're going to do it, replace the secondaries with Vibrant resonators

SINGH_ · 02-25-2014, 12:35 PM

Quote:

Originally Posted by HighPSI

If you're going to do it, replace the secondaries with Vibrant resonators

What is the purpose of replacing replacing the secondary cats with resonators versus a section of straight pipe? Any pictures and product numbers? Change in sounds/volume?

Thanks!

bmwm3redblack · 02-25-2014, 02:50 PM

Quote:

Originally Posted by E92 N54

What is the purpose of replacing replacing the secondary cats with resonators versus a section of straight pipe? Any pictures and product numbers? Change in sounds/volume?

Thanks!

The purpose is to avoid drone in lower rpm. But for me the sound is all right,and if you are on a highway for a long time, just keep above 2000rpm and it will sound awesome. IMO

02-24-2014, 08:16 PM	#1
N54bimmer Private 4 Rep 98 Posts Drives: E92 n54 Join Date: Apr 2011 Location: North America iTrader: (0)	Secondary cats delete Just wondering if anyone has any experience with a secondary cat delete on a stock exhaust. I read a few threads, but wanted more opinions, how much of an affect does it have on sound?
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02-25-2014, 01:09 AM	#2
NOTM3 Lieutenant 17 Rep 449 Posts Drives: E90 335i Join Date: Jun 2013 Location: Ft lauderdale iTrader: (3) Garage List 2008 Bmw 335i E90 [0.00]	its not a huge difference in sound
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02-25-2014, 04:55 AM	#3
bmwm3redblack Captain 59 Rep 886 Posts Drives: BMW ///M3 E46, BMW E92 335Xi Join Date: Jan 2011 Location: e13 osl iTrader: (0)	I've done mine deleted,and very happy for now, the sound is louderand more distinct. There is a slight drone between 1500-1800 rpm. But in general I 'm allright with it. Btw I ve gotcatless dp's aswell!!! __________________ Bmw 335xi/FBO/ black on black/ 6sp manual/Cobb AP/BMS DCI/AA BOV KIT/VRSF DP'S/VRSF 7'FMIC /FULLY CATLESS/H&R sport springs/ 19' ac schnitzer wheels.
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02-25-2014, 08:36 AM	#4
HighPSI Banned 9 Rep 280 Posts Drives: E92 335i Join Date: Nov 2012 Location: Toronto iTrader: (0)	If you're going to do it, replace the secondaries with Vibrant resonators
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