The Gruppe-M cold air intake looks fantastic, but doesn't really seal in the engine bay. The "seal" is made by screwing the molded air filter housing against the body of the car. A rubber seam in the filter housing mates with the body molding to make the seal. It doesn't seal nearly as nice as the factory unit, but makes up for it in the looks department.
The Gruppe-M CAI it is fitted with a nice K&N air filter, which probably
flows much better than the stock unit. In my opinion, it's the K&N air
filter that accounts for any performance gains -- not the unit design itself.
I want to say thanks to Mike at Rimier Motor Sport in Gilroy California (sullyz on m3post), for giving me great service and a great price on the intake.
|Temperature||77 degrees (F)|
|Pressure||29.753 - 29.774|
|Humidity||34.36% - 35.01%|
|SAE Correction||3.8% - 3.9%|
|Peak Performance Increase||
|Dyno Database Entry||Click HERE to view this DynoDB entry|
Torque Gains vs. RPM:
Horsepower Gains vs. RPM:
Sound Pressure Level Comparison