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      12-02-2011, 08:33 AM   #61
Alpina_B3_Lux
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Drives: Audi R8 V10, BMW 330d E91 LCI
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2009 335i  [4.39]
Quote:
Originally Posted by Ironring Racing View Post
And what's Mahle's sticker on there for. AFAIK, the Alpina motor is just a tuned N54, no internal work. Wasn't there some debate a while ago as to who made the N54 pistons?
The Alpina B3 / B3 S have always had low compression pistons by Mahle. Nothing new there. And that's the only real hardware difference to the standard N54 engine used in the 335i / 335iS.

The B3 S also features different primary catalysts, a secondary cats delete and a modified air intake. These - along with the flash tune - explains the difference in power compared to the standard 335i.

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