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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 > Removed Rear Muffler



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      09-23-2009, 11:32 AM   #1
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Removed Rear Muffler

Well yesterday when i had the car up on the lift doing the suspension, i though i should try taking the muffler off to see how it went(either way i had to in order to get the left shock bolt out). I put the car down from the lift and i went around the block and i love my new suspension, but then when i got on the gas the car with the muffler off felt like a new beast, its not even loud. The day before that i had put in the BMS DCI and the BMS JB3 with the 1.4Beta and it was a monster. Taking the muffler off really woke the car up even more. What are the negatives of this ?
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      09-25-2009, 07:37 AM   #2
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I don't know about adverse effects but I would like to see some pics and hear some sound clips if possible.
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      09-25-2009, 08:02 AM   #3
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+1 man ive been thinking about doing this out of pure curiousity.
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      09-25-2009, 08:33 AM   #4
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E92 or E90 ?
E90/91 has intermediate resonator that dims the sound
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      09-25-2009, 09:22 AM   #5
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Those things are HEAVY!
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      09-25-2009, 10:05 AM   #6
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drone was my problem when i took it off of my 335. other than that nothing. unless its so loud u attract po po
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      09-25-2009, 10:16 AM   #7
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I replaced all my exhaust parts with stainless , RR catted DPs , RR mid pipes (rear cat delete) , supersprint x-section and Remus quad mufflers ...

When making the supersprint ready for fitting I also drove a bit without anything from midpipes and midpipes and x-section with out anything else but pipes ... sound horrible with just the midpipes , to noisy and loss of torque , with the x-section added it was a different story less tractor sound and quite fun to drive you feel it at the end of the RPM really strong. But now I got it all fitted , the remus quads have a nice 60% less backpressure on exhaust and you need some of that to get that low RPM torque .
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      09-25-2009, 12:31 PM   #8
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There is no loss of torque with a straight pipe with the n54
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      09-25-2009, 12:45 PM   #9
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OP you had put the JB3 in only a day earlier - it is probably still adapting hence the huge performance difference.
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      09-25-2009, 12:52 PM   #10
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Quote:
Originally Posted by CubanJJ09 View Post
drone was my problem when i took it off of my 335. other than that nothing. unless its so loud u attract po po
Yes the police are a problem i got pulled over on i95 and i know it was because of my exhaust .....maybe the montego "pull me over" blue didnt help lol.I thought my car was a freak when i cut the muffs off but i think its the sound that makes the driving experience more fun.My uncle just cut his mufflers off a C6 ls2 and we lost like 3whp but the car feels faster lol.
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      09-25-2009, 12:55 PM   #11
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Quote:
Originally Posted by Jon335iFL View Post
Yes the police are a problem i got pulled over on i95 and i know it was because of my exhaust .....maybe the montego "pull me over" blue didnt help lol.I thought my car was a freak when i cut the muffs off but i think its the sound that makes the driving experience more fun.My uncle just cut his mufflers off a C6 ls2 and we lost like 3whp but the car feels faster lol.
the 335i without the mufflers is fun. i can see that for a track day but def. not all the time. and that ls2 must have made u bleed from the ears
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