Engine - 351W (Designed for engine firing order 1-3-7-2-6-5-4-8 Description - Hydraulic Flat Tappet Usage Recommendations & Performance Characteristics (Compared to standard production camshaft with production cylinder heads and intake manifold, except as noted.) - Ford Motorsport 351 HO SVO engine. (May require piston modification for piston-to-valve clearance.) Peak RPM (With production cylinder heds and intake manifold in most cases) Torque - 4500 Peak RPM (With production cylinder heds and intake manifold in most cases) BHP. - 5750 Duration Int. - 296 degrees Duration Exh. - 306 degrees Duration (at 0.050" lobe lift) Int. - 236 degrees Duration (at 0.050" lobe lift) Exh. - 246 degrees Valve Lift Int. - 0.520" Valve Lift Exh. - 0.538" Not legal for sale or use on pollution-controlled motor vehicles.