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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > E92 secondary cat and muffler delete!!



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      05-22-2015, 12:04 AM   #1
BrianT335i
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Has anyone done this? Currently have secondary cats deleted and am thinking of doing the same with mufflers! Have gotten a million mixed reviews on how it sounds and how it is too loud and then I have people saying it sounds good! Also, have seen a lot of people that have just gotten a muffler delete and not secondary cats so I'm curious to see how it would sound. I also have JB4 and BMS intakes so if it makes the engine sound better I'm all for it. If anyone has any experience please let me know
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      05-22-2015, 10:10 AM   #2
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Do not do this! I repeat, do not!

The only way this will sound good is if you add Vibrant resonators in the mix.
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      05-22-2015, 10:41 AM   #3
mg4734
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The closest I would come to this is BMW performance mufflers/secondary cat delete. The BMW performance mufflers have a pipe on each side that goes straight through, no holes... the only part that has holes for muffling the sound is what connects the two mufflers.
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      05-22-2015, 11:36 AM   #4
BrianT335i
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Quote:
Originally Posted by mg4734
The closest I would come to this is BMW performance mufflers/secondary cat delete. The BMW performance mufflers have a pipe on each side that goes straight through, no holes... the only part that has holes for muffling the sound is what connects the two mufflers.
How much do the mufflers run for?
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      05-22-2015, 02:30 PM   #5
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+1 for it sounding like shit unless you have a resonated midpipe.

I deleted EVERYTHING and it sounds like junk. Two vibrant mufflers just arrived so adding those to the mid pipe will hopefully fix it.


Vibrant mids or leave something in. Straight pipe = honda buzzy rasp junk
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      05-22-2015, 05:54 PM   #6
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Quote:
Originally Posted by BrianT335i View Post
How much do the mufflers run for?
Try and pick up a used one, or a new one off eBay. I've seen them new anywhere between 1,000-1,750. Used expect 800-1,200
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