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      05-11-2008, 01:15 AM   #1
Mr. 5
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Drives: M3
Join Date: Apr 2007
Location: Surf City, HB

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2007 e90 335i  [4.00]
Borla Exhaust Review!

A while back, I had the idea to come up with my own exhaust instead of paying a bunch of money for something else.
I cut out up my stock exhaust and added Magnaflow parts here and there.

It was a pretty good idea, but lately I've been going for a different sound.

Thanks to Harold from HP Autowerks and Borla, I finally received the sound that I was looking for.
I was thinking of the way that the Borla muffler is constructed and it made so much sense to me how they really might be able acheive a "back and forth" sound; kind of like the sounds of the V8s where the scavange back and forth.
Borla uses a single muffler in the rear instead of 2 different mufflers.
The single muffler is pretty much a resonated X pipe where the exhaust gases combine just before the exiting point.


The exhaust is very deep, yet does not drone one bit in my manual. Some have said that the exhaust is too quiet. I dont' understand what they want, but maybe my catless DPs are helping.

In the videos, you can here the back and forth gurgle, especially when I let my foot off the gas and leave it in gear. The sound is just beautiful!
I am extremely happy!

So, my exhaust is in the following configuration:

Ultimate Racing Catless Downpipes
High Flow Cats in the place of the OEM secondaries
Borla Exhaust



Let me know what you guys think.









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