Comp Cams 51-221-4 Pontiac Xtreme Energy Hydraulic Flat Tappet Camshaft XE256H

This Comp Cams 51-221-4 Pontiac XE256H Xtreme Energy Hydraulic Flat Tappet Camshaft fits the 265-455 Pontiac engines from 1955-1981. Comp designed this cam for street/strip use, and it features strong torque through low and mid-range with a good idle. A 9.0:1 or higher compression ratio and a 1500+ stall speed torque converter are highly recommended.

Comp Cams 51-221-4 Pontiac XE256H Xtreme Energy Hydraulic Flat Tappet Camshaft Specs:

• For 265-455 cubic inch Pontiac engines from 1955-1981
• Stock (O.E.) valve springs can NOT be used.
• Basic RPM Range: 1000 to 5200
• Valve Lift Intake: .447
• Valve Lift Exhaust: .455
• Advertised Intake Duration: 256
• Advertised Exhaust Duration: 268
• Intake Duration at .050”: 212
• Exhaust Duration at .050”: 218
• Lobe Separation: 110
• Intake Centerline: 106
• Firing Order: 1-8-4-3-6-5-7-2
• Made in the USA

Comp Cams designed this Hydraulic Flat Tappet camshaft for high performance on the street and drag strip.

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