Enigma135, yep, the Dinan Stage 2 is awesome.
You get approximately +50 hp and +90 lb/ft for about $2K purely thru software with a full warranty backstop to BMW's warranty if something goes "bang". It's more expensive than some of the other tunes, but you are buying Dinan's experience and warranty.
Take a look at the info and link to Dinan's 335i press release here. Feel free to write with any questions. Wish I could take you for a test drive!
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