Howards Cams 414145-12 Pontiac 4/7 Swap Hydraulic Roller

This Howards Cams 414145-12 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 performance, and it features good low to mid-range torque & power and a good idle. A 9.0:1+ compression ratio, lower rear end gears and a 2200+ stall speed torque converter come highly recommended.

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

Howards Cams 414145-12 Pontiac 4/7 Swap 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: 1800 to 6000
• Valve Lift Intake: .525
• Valve Lift Exhaust: .520
• Intake Duration: 272
• Exhaust Duration: 282
• Intake Duration at .050: 219
• Exhaust Duration at .050: 229
• Lobe Separation: 112
• Intake Centerline: 108
• Recommended Lifter Set: 91466 Retro-Fit Street
• Recommended Valve Springs: 98438
• Recommended Valve Spring, Retainer and Lock Kit: 98438-K12
• 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.

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