From Exotek Racing:
Stealthy black coated brass C block hanger for the B6.3-B6.1 73mm arms.
Not to be used with the B6.2 75mm arms.
The block weighs 24gr and helps improve rear traction by including weight at a low level beneath the gearbox.
Laser etched for simple identification.
#2036 – $22.95 MSRP