Description
This Howards Cams 418045-09 Pontiac Retro-Fit 4/7 Swap Big Mama Rattler 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 broad low to mid-range power band and a lopey idle. A 9.5:1+ compression ratio, lower rear end gears and a 2400+ stall speed torque converter come highly recommended.
4/7 Swap camshafts change the firing order to create even more power!
Howards Cams 418045-09 Pontiac 4/7 Swap Big Mama Rattler 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 5400
- Valve Lift Intake: .530
- Valve Lift Exhaust: .530
- Intake Duration: 288
- Exhaust Duration: 296
- Intake Duration at .050”: 235
- Exhaust Duration at .050”: 243
- Lobe Separation: 109
- Intake Centerline: 103
- 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 and on the drag strip.
Howards Hydraulic Roller Cams – From mild to wild, they are the ultimate in performance!
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