Secondary cat delete pros and cons

bigjae1976 · 12-26-2018, 10:15 PM

Thanks, I did. I hope you weren't working on your car on X-mas.

I'd be interested to hear your feedback. I'm going to do the straight through exhaust mod and see how it is sometime in 2019. Then maybe do test pipes. I would like to replace the OE plastic plenum with a CF piece. Despite my hatred for CF I think it would sound great!

Not sure that it is a common issue but Syt_Shadow possibly lost of motor to a clogged cat on his track car? I wouldn't go ripping off the cats in fear but I don't see a need for the primaries unless you have to pass emissions. I had a hole in my cat on my S54. It was spitting out platinum on the track.

DreamTime · 12-26-2018, 10:43 PM

Quote:

Originally Posted by bigjae1976

Thanks, I did. I hope you weren't working on your car on X-mas.

I'd be interested to hear your feedback. I'm going to do the straight through exhaust mod and see how it is sometime in 2019. Then maybe do test pipes. I would like to replace the OE plastic plenum with a CF piece. Despite my hatred for CF I think it would sound great!

Not sure that it is a common issue but Syt_Shadow possibly lost of motor to a clogged cat on his track car? I wouldn't go ripping off the cats in fear but I don't see a need for the primaries unless you have to pass emissions. I had a hole in my cat on my S54. It was spitting out platinum on the track.

Haha, I was not working on my car over Christmas... way too much good shit going on. Although, the pile of parts in my garage that I have been collecting for my winter work is becoming silly lmao. I will be busy AF working on car over Jan and Feb.

It does seem as though a carbon plenum makes a beautiful engine sound. I would only encourage such a thing

I'm also not worried about track performance for my E90 anymore either. I have my whole 2019 track season already planned and almost all of the events I will be driving the E30 racecar that I will be racing with my buddy starting in 2020. So, I don't feel the need to remove primary cats on my E90 for track purposes at this point.

I do look forward to hearing clips of your exhsust and/or CF plenum mods though! Keep me posted!

Makaveli7 · 12-27-2018, 03:51 AM

On the same topic - Anyone has any lead on some low profile resonators to replace the primary cats?

wfdeacon88 · 12-27-2018, 08:31 AM

Quote:

Originally Posted by Makaveli7

On the same topic - Anyone has any lead on some low profile resonators to replace the primary cats?

rogue resonated test pipes?

Makaveli7 · 12-27-2018, 02:42 PM

Quote:

Originally Posted by wfdeacon88

rogue resonated test pipes?

Thanks for this! Will give them a try

FrozenM3nace · 01-10-2019, 05:34 PM

PM I'll send you my number I have the ATAK and have tried diff combos like just the muffler, no res stock x pipe, no primaries stock x pipe, full catless but 2 res etc. So I can help with any questions you have regarding loudness, smell or drone.

DreamTime · 01-10-2019, 09:59 PM

Quote:

Originally Posted by Hyare1

PM I'll send you my number I have the ATAK and have tried diff combos like just the muffler, no res stock x pipe, no primaries stock x pipe, full catless but 2 res etc. So I can help with any questions you have regarding loudness, smell or drone.

Awesome, thanks man. PM sent. I'm always down for car talk.

12-26-2018, 10:15 PM	#23
bigjae1976 Major General 2013 Rep 8,248 Posts Drives: 11 E90 M3 Individual Join Date: Mar 2006 Location: Houston, TX iTrader: (22) Garage List 2004 BMW M3 [6.33] 2011 BMW E90 M3 [6.83] 2013 BMW 328i [6.67]	Blank Thanks, I did. I hope you weren't working on your car on X-mas. I'd be interested to hear your feedback. I'm going to do the straight through exhaust mod and see how it is sometime in 2019. Then maybe do test pipes. I would like to replace the OE plastic plenum with a CF piece. Despite my hatred for CF I think it would sound great! Not sure that it is a common issue but Syt_Shadow possibly lost of motor to a clogged cat on his track car? I wouldn't go ripping off the cats in fear but I don't see a need for the primaries unless you have to pass emissions. I had a hole in my cat on my S54. It was spitting out platinum on the track. __________________ 2018 F30 320iX Melbourne Red 2011 E90 M3 Monte Carlo Blue 2004 E46 M3 Imola Red 2000 E36/7 Z3 Steel Blue
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12-27-2018, 03:51 AM	#25
Makaveli7 Enthusiast 118 Rep 150 Posts Drives: M3 E92 Jerez Black Join Date: May 2012 Location: Dubai iTrader: (0)	On the same topic - Anyone has any lead on some low profile resonators to replace the primary cats? __________________ https://www.instagram.com/makaveli777/
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01-10-2019, 05:34 PM	#28
FrozenM3nace 114 Rep 480 Posts Drives: 27 G80 M3CX, BMW M3 E92, 15 R8 V10 Plus, W204 C63 Join Date: Mar 2013 Location: Vancouver B.C iTrader: (0)	PM I'll send you my number I have the ATAK and have tried diff combos like just the muffler, no res stock x pipe, no primaries stock x pipe, full catless but 2 res etc. So I can help with any questions you have regarding loudness, smell or drone.
	Appreciate 1 DreamTime914.00 Quote