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Old 01-13-2013, 06:53 AM
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CALWATERBOY CALWATERBOY is offline
Officially Welcomed to the 'Fest
Location: San Francisco
 
Join Date: Aug 2009
Posts: 10,007
Mein Auto: 2009 E93 N54
Quote:
Originally Posted by loso81 View Post
what exactly is a downpipe, and does it give your factory exhaust a more aggressive sound? My recent car that i had prior to my 09 335xi was a infiniti g35 coupe, the factory exhaust on my g35 coupe sounded "sexy" and had a more aggressive sound than my 335xi. Help! lol

The pipe that goes down from the cyl head to the exhaust pipe running aft.

Sound? Wikipedia "muffler"

Add'l info for 335i - click Post #2 links.

Beware. Changing back pressure on an engineered-to-the-edge ride like yer 335i is fraught with performance issues. You're safe with BMW performance exhaust, which comes with a factory software adj and $1100+ wallet lightener.

Much tech info at N54TECH and E90POST.


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Last edited by CALWATERBOY; 01-13-2013 at 06:56 AM.
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