It's smaller, and lighter.
A strong, rebuildable twin disc.
Machined forged carbon steel
Machined for OE functionalities.
The 420G found in the E46 M3 and E39 M5 are finicky transmissions that are relatively intolerant to lightweight flywheels for street use.
They'd loud, rattly, and are often coupled with a heavily sprung single clutch to compensate.
A twin disc should give us more power holding capacity, while dividing the required left foot strength between 2 discs.
Swipe right to assemble.
You will need new Genuine BMW crankshaft bolts (SKU: 11227805885). The Genuine BMW throwout bearing is a highly recommended part while in there (SKU: 21517548396).
The inlet guide tube needs to be modified for the 420G to accommodate the twin disc clutch design. Instructions are provided by TTV.
Been there, done that.
TTV Industrial has been in the business of precision engineering for over 30 years.
TTV Racing is a division made up of a core group of enthusiasts in a family run business located in the East of England.
They design and manufacture automotive parts for high end original equipment & motorsport, club racer to world championship.
I run their products across my entire M cars to great effect, and they've been a stand up company.