Originally Posted by
XRT_si
The early hatchback M135i is a performance bargain, thinking of getting one as a new daily next.
It runs an E-LSD as standard, which actually does an OK job. I have a complete E92 M3 rear axle, including plated diff, waiting to go on it.
And nope, doesn't run an air filter and hasn't done for around 10,000 miles. Recently had the compressor housing off and it's all good.
Gotcha,
My 135i had the Quaife diff which was a huge improvement, Birds found that BMW run the 135 very stiff to try and aid traction, when you improve the rear end you can soften the shocks and spring / roll bars and that vastly improves the ride quality and handling.
That M3 rear end will help a LOAD I am sure.
Is yours a manual? I assume the torque limits have been taken off 1st and 2nd that the standard cars have to control traction?