From Exotek Racing:
Stealthy black coated brass C block hanger for the B6.3-B6.1 73mm arms.
Not for use with the B6.2 75mm arms.
The block weighs 24gr and helps increase rear traction by adding weight at a low point under the gearbox.
Laser etched for easy identification.
#2036 – $22.95 MSRP