This Comp Cams 12-450-8 SBC 286HR Magnum Retro-Fit Hydraulic Roller Camshaft fits the 262-400 Small Block Chevy from 1958-1998. Comp designed this cam for street/strip use, and it features great low-end torque and a rough idle. Also has a limited vacuum. A 9.5:1 or higher compression ratio, aftermarket intake & headers, and a 2900+ stall speed torque converter are highly recommended. Comp Cams 12-450-8 SBC 286HR Magnum Retro-Fit Hydraulic Roller Camshaft Specs: For 262-400 cubic inch Small Block Chevy engines from 1958-1998 Requires thrust button & wear plate Must use bronze tip fuel pump pushrod when using high pressure or high-volume pump Stock (O.E.) valve springs can NOT be used Basic RPM Range: 2500 to 6000 Valve Lift Intake: .560 Valve Lift Exhaust: .560 Advertised Intake Duration: 286 Advertised Exhaust Duration: 286 Intake Duration at .050”: 230 Exhaust Duration at .050”: 230 Lobe Separation: 110 Firing Order: 1-8-4-3-6-5-7-2 Made in the USA Comp Cams designed this Retro-Fit Hydraulic Roller camshaft for high performance on the street and drag strip. Comp Cams –The Absolute Leader In Valve Train Technology!