3-PC. DOUBLE-ROLLER TIMING CHAIN SET Engineered for accurate, constant timing, faster acceleration and top-speed performance For '56-90 American engines Holds degree wheel accuracy by cutting down lag due to "stretch" for peak performance. Double chain provides positive drive and timing for peak power and speed from lightning-fast acceleration to full-out power. Flame-hardened double-roller cam and crank sprockets for maximum strength and long wear. Precision engineered, matched for perfect fit and quiet operation. Chain, crank and cam gear included. Applications:1977-1988 Chevrolet All Models 183; 196; 231; 252 with integral dist. drive,1977-1988 Buick All Models 183; 196; 231; 252 with integral dist. drive |