Damn, that 135i is fast. When you’re running 540 whp and 538 wtq with 100 octane you better be. Yea sure the GTR and 997TT are always going to be fast but to see a 135, albeit modified, keeping pace with the other two which are also modded, now that’s competition.

ASR Engineering out of Miami, FL upgraded the turbos to the 135i and bolted on some goods to the GTR and Porsche, with the GTR making 540-550whp and the Porsche 510whp. Not bad. The real performance lies in the badly shot videos below.

(Source: M5Board; photo via GreatOne! @Flickr