Replacing secondary cats with resonators.

remixsecret · 06-01-2020, 05:30 PM

Hi, my current exhaust setup is:

VRSF Downpipes
Secondary Cats
Magnaflow exhaust with an X-Pipe

If I replace the secondary cats with these resonators, will it increase sound?
Here’s a photo below.

N54_ABQ · 06-01-2020, 05:55 PM

It will increase slightly.

I gutted my secondary cats, they act just as resonators without the ceramic honeycomb. It was noticeable but only slightly louder, mostly on cold starts.

I only have cat-less downpipes, stock mufflers. So results may vary with other exhaust mods.

turbohugh · 06-01-2020, 06:27 PM

Do it ..will sound awesome.. but you will probably get the eye-watering smell of hydrocarbons at stoplights.
Surely you laugh at emissions in your state.
Cheers, its 5 oclock somewhere.

remixsecret · 06-02-2020, 08:06 AM

I think I’m going to do it! Will these be any different than the vibrant 1792?

mweisdorfer · 06-02-2020, 11:27 AM

Quote:

Originally Posted by remixsecret

I think I'm going to do it! Will these be any different than the vibrant 1792?

If you do a secondary cat delete, you should absolutely replace them with Vibrant 1792.

I wouldn't try and reinvent the wheel.

06-01-2020, 05:30 PM	#1
remixsecret Private First Class 18 Rep 189 Posts Drives: 2009 335i Join Date: Jun 2015 Location: Alberta, Canada iTrader: (0)	Replacing secondary cats with resonators. Hi, my current exhaust setup is: VRSF Downpipes Secondary Cats Magnaflow exhaust with an X-Pipe If I replace the secondary cats with these resonators, will it increase sound? Here’s a photo below.
	Appreciate 0 Tweet Quote

06-01-2020, 05:55 PM	#2
N54_ABQ Twins Are Better 46 Rep 53 Posts Drives: 2007 335i E92 6MT Join Date: Sep 2018 Location: Albuquerque, NM iTrader: (0) Garage List 2007 BMW 335i E92 [0.00]	It will increase slightly. I gutted my secondary cats, they act just as resonators without the ceramic honeycomb. It was noticeable but only slightly louder, mostly on cold starts. I only have cat-less downpipes, stock mufflers. So results may vary with other exhaust mods.
	Appreciate 0 Quote

06-01-2020, 06:27 PM	#3
turbohugh ASCMA General 51 Rep 157 Posts Drives: E90-N54 <>E36 328Vert Join Date: Nov 2015 Location: Somewhere in Washington DC iTrader: (0)	Do it ..will sound awesome.. but you will probably get the eye-watering smell of hydrocarbons at stoplights. Surely you laugh at emissions in your state. Cheers, its 5 oclock somewhere.
	Appreciate 0 Quote

06-02-2020, 08:06 AM	#4
remixsecret Private First Class 18 Rep 189 Posts Drives: 2009 335i Join Date: Jun 2015 Location: Alberta, Canada iTrader: (0)	I think I’m going to do it! Will these be any different than the vibrant 1792?
	Appreciate 0 Quote