Eventhough I'm biased.. go with the 335, very easy to mod, it's essentially a detuned 400hp / 400lbft engine from the factory.. Shiv just ran 11.5XX at 125mph today with tune and meth.. and the torque is AMAZING!! And HPF is working on a single turbo upgrade, so the next few years of development will be really fun, believe me it won't be viewed as just another 3 series..
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2008 E90 335
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