nope... the m5 is too friggin heavy for me to waste money on trying to fix its handling issues.... the chassis had serious flex and needs a heavy duty cage.

but for your purposes, the gc or any other brand of coilover will do miracles for the ride quality and handling. mainly anything with a stiff spring rate and a matched shock will feel worlds better... it'll still understeer like a boat tho...

Totally fantastic street car.. i miss mine...