IS exhaust?

AW750Li · 10-22-2014, 03:42 PM

I have a e92 n54 335xi with catless downpipes and muffler delete. I don't like the sound of the muffler delete and catless downpipes (excessive rasp, drone, cheap sound), so I'm looking for a new setup.

Is it worth it to buy new 335is mufflers or just put the stock mufflers back on? Is there a noise difference from the IS mufflers+catless downpipes compared to the stock mufflers+catless downpipes?

Thanks for all your help

Johnny Boost · 10-22-2014, 04:52 PM

I would just do the PE mod to your stock muffler. IS exhaust is essentially the same thing and not worth the money IMO. The IS exhaust is really similar to the stock 335i exhaust except it has less packing inside of it. If you're set on spend several hundreds of dollars on the IS exhaust, you might as well pay a few hundred more for the BMW PE which is better. A friend of mine had an IS with downpipes and it was pretty raspy. So if that's what you're trying to avoid then you may be wasting your time.

drunkenup · 10-22-2014, 05:33 PM

me thinks an x-pipe will reduce rasp

10-22-2014, 03:42 PM	#1
AW750Li Second Lieutenant 17 Rep 294 Posts Drives: M3,335,750Li,X5,X3 Join Date: Mar 2011 Location: Long Island New York iTrader: (1)	IS exhaust? I have a e92 n54 335xi with catless downpipes and muffler delete. I don't like the sound of the muffler delete and catless downpipes (excessive rasp, drone, cheap sound), so I'm looking for a new setup. Is it worth it to buy new 335is mufflers or just put the stock mufflers back on? Is there a noise difference from the IS mufflers+catless downpipes compared to the stock mufflers+catless downpipes? Thanks for all your help __________________
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10-22-2014, 04:52 PM	#2
Johnny Boost Colonel 325 Rep 2,016 Posts Drives: '21 M850i GC Join Date: May 2013 Location: TBD iTrader: (0)	I would just do the PE mod to your stock muffler. IS exhaust is essentially the same thing and not worth the money IMO. The IS exhaust is really similar to the stock 335i exhaust except it has less packing inside of it. If you're set on spend several hundreds of dollars on the IS exhaust, you might as well pay a few hundred more for the BMW PE which is better. A friend of mine had an IS with downpipes and it was pretty raspy. So if that's what you're trying to avoid then you may be wasting your time. __________________ WedgePerformance E40 MHD \| Performance Exhaust Mod \| BMS DP \| Vibrant 1790 \| BMS Intake \| VRSF CP \| xHP Stage 3 Michelin PSS \| M3 Control Arms LUX v4 LEDs \| Shadowline Grills \| Lip Spoiler
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10-22-2014, 05:33 PM	#3
drunkenup Major 229 Rep 1,002 Posts Drives: 2009 135i, 2021 F150 Join Date: Sep 2013 Location: NJ iTrader: (1)	me thinks an x-pipe will reduce rasp
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