Mini and Micro Sprint Cars:

: Rear Sprocket, 6-bolt hole on 5.250 bolt circle.; Rear Sprocket, 6-bolt hole on 5.250 bolt circle, 1/4in bolt holes. Non-Split rear sprockets. 520 chain size.

: Rear Sprocket, 6-bolt hole on 6.50 bolt circle.; Rear Sprocket, 6-bolt hole on 6.50 bolt circle. Bolt holes are counter sunk. 520 chain

: Counter Shaft Sprockets 520 chain used on Sprint Cars.; Counter Shaft Sprockets 520 chain used on Sprint Cars.

: Counter Shaft Sprockets 530 chain used on Sprint Cars.; Counter Shaft Sprockets 530 chain used on Sprint Cars.

California Proposition 65

California Prop 65 | Reproductive Harm and Cancer Warning! https://www.p65warnings.ca.gov/ WARNING: This product contains a chemical known to the State of California to cause cancer.