CARB Compliant- EO# D-355-5, 80" Displacement, 4 1/4" Stroke, S&S 520 Camshaft, S&S Forged Pistons, Compression Ratio 10:1, S&S Super E carburetor, Super Stock® Ignition, Classic Teardrop Air Cleaner, S&S Forged Roller Rockers, S&S Chrome Rocker Covers.