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      10-05-2012, 01:33 PM   #43
doughboy
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Drives: E91 335i Sold.
Join Date: Jan 2009
Location: UK

Posts: 6,360
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Quote:
Originally Posted by Sparky68 View Post
Have seen the 335i running 500+ wBHP on stock internals. There would need to be something already wrong with your car for the JB4 to do any damage in my opinion [have a read on the n54/n55 threads]
http://www.e90post.com/forums/forumdisplay.php?f=58
The single turbo conversion guys in the US are running 700bhp+ on a totally standard engine and gearbox, and that's drag racing too which is harder on the car than road use.

Uprated clutch and halfshafts is about it.
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