View Single Post
      12-10-2011, 06:30 PM   #24
E46 + E90

Drives: E46 M3 + E90 M3
Join Date: Jul 2008
Location: Illinois

iTrader: (1)

Garage List
2009 BMW M3  [0.00]
2002 BMW M3  [0.00]
As many have already mentioned, there really is no substantial power to be gained from an axel-back muffler. Most of the power to be freed from the exhaust would be by deleting the primary cats.

There is some very educational information in this thread regarding Evolve's new E-Tronic Valve Exhaust. They actually shared data testing looking at different parameters such as back pressure, power, torque, and different valve settings.

You also mentioned the Dinan tune. I would highly recommend you look into other options there that offer a lot for their value.

If you are looking for power, while keeping costs down, I would personally get the Evolve XPipe and Tune.

If you are looking for power, refined and adjustable volume/tone, with no limit on costs, I would check out the Evolve E-Tronic Exhaust and Tune.

My biggest recommendation is that you try to find cars that have different exhaust setups and listen to them in person. Videos and Audio clips can only depict so much and often times, they're never entirely accurate.
E90 M3 DCT|Melbourne Red . Speed Cloth | My Build Thread
E46 M3 6MT|Jet Black . Black Nappa Leather | My Build Thread