Quote:
Originally Posted by benjamin84
I think the 120d is the smallest engine they do it for  Enough torque for it to be warranted though (350Nm in the 120d, 400Nm in a 135i), especially in the wet or on snow 
The Quaife cost me £890, about $1400, and £400 ($620) to mount. Definitely worth it for me, and I plan to do the same mod to every future BMW I own  Compared to the cost of a 135i I would presume it's fairly negligible? Mind you a 135i is $130.000 in Norway so it might compare differently in the US.
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I asked this because they don't have it on the website. I know the 20d has more than enough torque. Being european i'm very used to diesel cars, but what you should have done is a before and after video :P that way we could see the real diferance. I've been thinking of getting a 1 series, but the fact that the 20d didn't have a LSD and i thought there wasn't one on the market made me think of going to the 23d (which has something different and gives you the chance, if you wan't BMWP brakes, to have the rears in yellow).