BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST - View Single Post - Chassis reinforcement plate (from CPM Japan)

Bee Pee · 11-05-2015, 11:03 AM

I have installed the F80 plate and similar cross brace for F2x series.

I have quaife LSD and JB4 with ~ 400bhp/460lbft and the rear brace positively locates rear subframe to the underbody.

More power and QLSD putting more reactions into the rear subframe bushes meant occasionally worming under hard acceleration. With underbody chassis bracing the rear is now much more stable and any and all of the aforementioned wobbles have gone and the car is now even more composed especially over bumpy roads, typical of what we have here in the UK.

11-05-2015, 11:03 AM	#38
Bee Pee Brigadier General 1784 Rep 4,525 Posts Drives: AW M2 DCT Join Date: Jun 2010 Location: SW London iTrader: (3)	I have installed the F80 plate and similar cross brace for F2x series. I have quaife LSD and JB4 with ~ 400bhp/460lbft and the rear brace positively locates rear subframe to the underbody. More power and QLSD putting more reactions into the rear subframe bushes meant occasionally worming under hard acceleration. With underbody chassis bracing the rear is now much more stable and any and all of the aforementioned wobbles have gone and the car is now even more composed especially over bumpy roads, typical of what we have here in the UK. __________________ Fettled M135i EB AT then AW M2 DCT - both gone but not forgotten: Current '22 X3M LCI..
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