Challenge Engineering already builds one of the best rear diffuser designs available with their original piece for the M3. This diffuser has aggressive lines and a look that stands out from any other diffuser for the car.

Despite this, Challenge continues to expand their offerings and give M3 enthusiasts more and more choices as time goes on.

Challenge Engineering's new Sport diffuser is inspired by the clean, simple lines of the original E46 M3 CSL diffuser to create a unique and subtle piece for the E92. The fins are understated with a curved shape that integrates nicely into the lines of the OEM bumper. The center section includes a sculpted depression that gives the diffuser a more complex appearance.

As with all carbon fiber items from Challenge Engineering, each pieces is made in house in their Midwest facility and built from the highest grade materials. Challenge uses only carbon fiber in manufacturing this diffuser, with no fiberglass backing.

 

Beautifully crafted. Challenge parts are top quality.

 

It looks great!

 

Greggs stuff is art!