Howards Cams 417251-15 Pontiac American Muscle Hydraulic Flat Tappet

This Howards Cams 417251-15 Pontiac American Muscle Hydraulic Flat Tappet Camshaft fits 265-455 cubic inch Pontiac engines from 1955-1981. Howards designed this camshaft as a near-duplicate of the Pontiac Ram Air III 366hp/400 cam (GM #9785744), and it features nice low to mid-range torque & horsepower, and has a smooth idle. A 9.5:1+ compression ratio and a 2200+ stall speed torque converter are highly recommended.

Howards Cams 417251-15 Pontiac American Muscle Hydraulic Flat Tappet Camshaft Specs:

• For Pontiac 265-455 engines from 1955-1981
• Basic RPM Range: 1800 to 5400
• Valve Lift Intake: .407
• Valve Lift Exhaust: .407
• Intake Duration: 301
• Exhaust Duration: 313
• Intake Duration at .050”: 224
• Exhaust Duration at .050”: 236
• Lobe Separation: 115
• Intake Centerline: 112
• Firing Order: 1-8-4-3-6-5-7-2
• Made in the USA

Note: Stock (O.E.) valve springs can NOT be used

Howards Cams designed this Hydraulic Flat Tappet camshaft for high performance on the street.

Howards Hydraulic Flat Tappet Cams - From mild to wild, they are the ultimate in performance!