The Keystone Invasion for the AMSOIL USAC National Sprint Car National Championship features four races in four days at Grandview, Big Diamond, BAPS, and Path Valley.
Joey Biasi Huge USAC Sprint Flip at Big Diamond
Apr 24, 2021
Joey Biasi takes a massive ride in the USAC National Sprint Car Semi-Main at Big Diamond, from Apr. 23 on FloRacing.