My stealth muffler delete plan

Mr.Snail · 08-26-2013, 02:22 PM

Ok well I'm currently running stock dps and exhaust and am looking to free up some sound until next year when I put catless dps and an aftermarket exhaust on. My plan is to remove the roughly 1 ft section of pipe before the mufflers ( leaving all hangers intact) and put simple exhaust turn downs on them while retaining the stock mufflers for unmodified appearance, even though no exhaust will be passing through them.

My question becomes does anyone know the outside diameter of the stock piping in that last section of pipe? I'd like to get turn downs in the correct size to just slip over the stock pipe and clamp on.

I6+TT=FTW · 08-26-2013, 05:19 PM

I think it is 2.38" to be exact. I did use 2.5" pipe for my muffle delete, but there is a good amount of weld going from stock piping to the new piping.

idrift4wd · 08-26-2013, 05:24 PM

you know you could do a muffler delete and reweld the stock tips to appear factory. There is no point of carrying 20-30 pounds of unused mufflers. factory exhaust piping is 2.5" I believe.

longliven54 · 08-26-2013, 07:01 PM

cut-outs can be welded in. quiet when you want, or not at all quiet when you want. not expensive either
only downside is, cut outs tend to leak over time. all that means is that the exhaust wont be as quiet when running the quiet mode. I only use the quiet mode when family/ wife are in the car.

longliven54 · 08-26-2013, 07:01 PM

cut-outs can be welded in. quiet when you want, or not at all quiet when you want. not expensive either
only downside is, cut outs tend to leak over time. all that means is that the exhaust wont be as quiet when running the quiet mode. I only use the quiet mode when family/ wife are in the car.

longliven54 · 08-26-2013, 07:01 PM

cut-outs can be welded in. quiet when you want, or not at all quiet when you want. not expensive either
only downside is, cut outs tend to leak over time. all that means is that the exhaust wont be as quiet when running the quiet mode. I only use the quiet mode when family/ wife are in the car.

infidel335 · 08-26-2013, 07:06 PM

Quote:

Originally Posted by idrift4wd

you know you could do a muffler delete and reweld the stock tips to appear factory. There is no point of carrying 20-30 pounds of unused mufflers. factory exhaust piping is 2.5" I believe.

Man it's a lot more than that, haha. I have a muffler delete and the factory muffler must be made out of 1/4 inch steel. Piping is 2.5 inches and I'd also recommend running straight pipe from the secondaries.

Johnny Boost · 08-26-2013, 09:49 PM

Quote:

Originally Posted by idrift4wd

you know you could do a muffler delete and reweld the stock tips to appear factory. There is no point of carrying 20-30 pounds of unused mufflers. factory exhaust piping is 2.5" I believe.

Would the stealership be able to detect something like this?

JStang · 08-26-2013, 10:13 PM

Quote:

Originally Posted by Johnny Boost

Would the stealership be able to detect something like this?

If they were under the car they would be morons if they didn't notice it.

idrift4wd · 08-26-2013, 11:36 PM

Quote:

Originally Posted by Johnny Boost

Would the stealership be able to detect something like this?

Quote:

Originally Posted by JStang

If they were under the car they would be morons if they didn't notice it.

lol +1

Its a very noticeable mod (under and outside). Maybe illegal in certain states also.

JayDE90 · 08-27-2013, 11:40 PM

Quote:

Originally Posted by idrift4wd

Quote:

Originally Posted by Johnny Boost

Would the stealership be able to detect something like this?

Quote:

Originally Posted by JStang

If they were under the car they would be morons if they didn't notice it.

lol +1

Its a very noticeable mod (under and outside). Maybe illegal in certain states also.

Lol yeah and if you're in Cali and they catch you with it...death penalty...no questions asked!

08-26-2013, 02:22 PM	#1
Mr.Snail Private First Class 13 Rep 142 Posts Drives: bmw Join Date: Feb 2013 Location: North East iTrader: (2)	My stealth muffler delete plan Ok well I'm currently running stock dps and exhaust and am looking to free up some sound until next year when I put catless dps and an aftermarket exhaust on. My plan is to remove the roughly 1 ft section of pipe before the mufflers ( leaving all hangers intact) and put simple exhaust turn downs on them while retaining the stock mufflers for unmodified appearance, even though no exhaust will be passing through them. My question becomes does anyone know the outside diameter of the stock piping in that last section of pipe? I'd like to get turn downs in the correct size to just slip over the stock pipe and clamp on.
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08-26-2013, 05:19 PM	#2
I6+TT=FTW Banned 7 Rep 83 Posts Drives: 2007 335xi Sedan Jet Black Join Date: Jul 2013 Location: Fort Collins, CO iTrader: (0)	I think it is 2.38" to be exact. I did use 2.5" pipe for my muffle delete, but there is a good amount of weld going from stock piping to the new piping.
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08-26-2013, 05:24 PM	#3
idrift4wd Brigadier General 151 Rep 3,549 Posts Drives: Three Hundred and Thirty Five Join Date: Jul 2010 Location: Yonkers NY iTrader: (0) Garage List 2007 BMW [7.00]	you know you could do a muffler delete and reweld the stock tips to appear factory. There is no point of carrying 20-30 pounds of unused mufflers. factory exhaust piping is 2.5" I believe. __________________ 12.0 @ 117
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08-26-2013, 07:01 PM	#4
longliven54 Lieutenant 14 Rep 455 Posts Drives: 2007 335i e90 auto Join Date: Jan 2011 Location: victoria iTrader: (6)	cut-outs can be welded in. quiet when you want, or not at all quiet when you want. not expensive either only downside is, cut outs tend to leak over time. all that means is that the exhaust wont be as quiet when running the quiet mode. I only use the quiet mode when family/ wife are in the car. __________________ JB4 G5 / VRSF IC / STETT CAI / GREDDY / custom exhaust / iRotora cross drilled rotots / snow stage 3 meth / 19" iForged senekas / upgraded speakers n CF woofer box / M3 bits/ DINAN camber plates/ KONI/ megan racing toe arm/ supreme power lowering perch
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08-26-2013, 07:01 PM	#5
longliven54 Lieutenant 14 Rep 455 Posts Drives: 2007 335i e90 auto Join Date: Jan 2011 Location: victoria iTrader: (6)	cut-outs can be welded in. quiet when you want, or not at all quiet when you want. not expensive either only downside is, cut outs tend to leak over time. all that means is that the exhaust wont be as quiet when running the quiet mode. I only use the quiet mode when family/ wife are in the car. __________________ JB4 G5 / VRSF IC / STETT CAI / GREDDY / custom exhaust / iRotora cross drilled rotots / snow stage 3 meth / 19" iForged senekas / upgraded speakers n CF woofer box / M3 bits/ DINAN camber plates/ KONI/ megan racing toe arm/ supreme power lowering perch
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