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View Full Version : Classy, inexpensive cat-back or muffler?


Kirkvw72
04-24-2009, 03:10 PM
Hello,

Does anyone have any knowledge of a cat-back exhaust or even a muffler than doesn't cost $1300 that is not a piece of crap or "fast and furious"?

I will keep the stock intake, though I am not opposed to swapping the filter to a K&N, etc.

Thoughts?
slvrXI
04-25-2009, 12:18 AM
Hello,

Does anyone have any knowledge of a cat-back exhaust or even a muffler than doesn't cost $1300 that is not a piece of crap or "fast and furious"?

I will keep the stock intake, though I am not opposed to swapping the filter to a K&N, etc.

Thoughts?

Just stick with a muffler, Catback can be kind of hassle. Look at Eisenmann mufflers. They sound great and are lighter than stock.
Kirkvw72
04-28-2009, 08:45 AM
I looked into the Eisenmann exhaust. $1247 is a little steep. Thanks for the suggestion though.
rattmobbins
04-28-2009, 01:30 PM
You looking for sound or power? If you're just looking for sound, look into the muffler delete. Lots of folks on here seem to be a big fan of the ol' muffler delete...

Ahhhh, here ya go...

http://forums.bimmerforums.com/forum/showthread.php?t=1198881
cabin
04-28-2009, 08:03 PM
Check out the Rogue IKON
Beer Goggles
04-28-2009, 08:10 PM
None of the exhaust for NA is really going to make any power.
duncan17
04-29-2009, 09:07 AM
If you look at the May issue of Grassroots Motorsports there is an extensive test of 5 or 6 systems for the 335i with dyno results. Not a perfect answer but might give you more information.
Beer Goggles
04-29-2009, 12:58 PM
A little marketing trick insight.

When you dyno a car, any car the results vary...from 3-5hp. That's simply because each run is different and the engine/air temps will never be the same.


So lets say you take 3 dyno runs with a stock car and get

300
292
302

You can have a +7 HP difference with no changes at all.

You put an exhaust on and you get
295, 298, 303

All still with in acceptable error of the stock car.

But when you take the highest result and the lowest result you get a 11hp swing. Now is that really an 11hp bump in power? Who knows but you can tell people it is.
duncan17
04-29-2009, 01:21 PM
That's a very good point.
See http://www.dinancars.com/bmw/technial-info/dynamometer-testing-and-the-modern-bmw-engine
for a longer discussion on this subject.