This Howards Cams 414345-10 Pontiac Retro-Fit 4/7 Swap Hydraulic Roller Camshaft fits 265-455 cubic inch Pontiac engines from 1955-1981. Howards designed this cam for street/strip use, and it features a choppy idle. A 9.0:1+ compression ratio, a good intake & headers, and a 2400+ stall speed torque converter are highly recommended.

4/7 Swap camshafts change the firing order to create even more power!

Howards Cams 414345-10 Pontiac Hydraulic Roller Camshaft Specs:

• Ignition Firing Order Must Be Changed To: 1-8-7-3-6-5-4-2
• For Pontiac 265-455 engines from 1955-1981
• Basic RPM Range: 2000 to 6200
• Valve Lift Intake: .560
• Valve Lift Exhaust: .560
• Intake Duration: 280
• Exhaust Duration: 290
• Intake Duration at .050”: 227
• Exhaust Duration at .050”: 237
• Lobe Separation: 110
• Intake Centerline: 106
• Made in the USA

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

Howards Cams designed this Hydraulic Roller camshaft for high performance on the street and on the drag strip.

Howards Hydraulic Roller Cams – From mild to wild, they are the ultimate in performance!