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Technical Articles for Part Number HRS-418045-09
Howards Cams Rattler Camshafts
Camshaft, Hydraulic Roller Tappet, Rattler, Advertised Duration 288/296, Lift .530/.530, Pontiac, V8, Each
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Estimated Ship Date: Dec 31, 2026 Would you rather pick it up?
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COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 51-601-11
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Estimated Ship Date: Dec 21, 2026
Overview
Brand:
Manufacturer's Part Number:
418045-09
Part Type:
Product Line:
Summit Racing Part Number:
HRS-418045-09
UPC:
840793134533
Cam Style:
Hydraulic roller, Retro-fit
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
Designed for Street or Street/Strip applications. Lopey idle. Needs 9.0:1 compression and a 2,500+ stall converter.
Basic Operating RPM Range:
2,000-5,400
Intake Duration at 050 inch Lift:
235
Exhaust Duration at 050 inch Lift:
243
Duration at 050 inch Lift:
235 int./243 exh.
Advertised Intake Duration:
288
Advertised Exhaust Duration:
296
Advertised Duration:
288 int./296 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.530 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.530 in.
Valve Lift with Factory Rocker Arm Ratio:
0.530 int./0.530 exh.
Lobe Separation (degrees):
109
Remanufactured:
No
Computer-Controlled Compatible:
No
Valve Springs Required:
Yes
Quantity:
Sold individually.
Howards Cams Rattler Camshafts
Howards Cams Rattler camshafts build solid power and a classic sound while retaining drivability. They feature wider lobe centers and use a more aggressive ramp rate to help with air velocity. Although their design is for high-performance street use, they also work well with a stock torque converter. Howards Cams recommends using their Rattler camshafts with a converter stalling above 1,800 rpm and a set of steeper rear-end gears.
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