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Technical Articles for Part Number HRS-197715-13
Howards Cams American Muscle Hydraulic Roller Tappet Camshafts 197715-13
Part Number: HRS-197715-13
Howards Cams American Muscle Hydraulic Roller Tappet Camshafts
Camshaft, American Muscle, Hydraulic Roller Tappet, Advertised Duration 274/285, Lift .525/.525, Chevy, Small Block LS, Each
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Estimated Ship Date: Dec 29, 2026
Overview
Brand:
Manufacturer's Part Number:
197715-13
Part Type:
Product Line:
Summit Racing Part Number:
HRS-197715-13
UPC:
840793109005
Cam Style:
Hydraulic roller, OE roller
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
Wider lobe separation for easier tuneability and smoother power band.
Basic Operating RPM Range:
1,900-7,300
Intake Duration at 050 inch Lift:
226
Exhaust Duration at 050 inch Lift:
236
Duration at 050 inch Lift:
226 int./236 exh.
Advertised Intake Duration:
274
Advertised Exhaust Duration:
285
Advertised Duration:
274 int./285 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.525 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.525 in.
Valve Lift with Factory Rocker Arm Ratio:
0.525 int./0.525 exh.
Lobe Separation (degrees):
113
Camshaft Gear Attachment:
3-bolt
Remanufactured:
No
Computer-Controlled Compatible:
Yes
Valve Springs Required:
No
Quantity:
Sold individually.
Notes:
Custom computer tuning required.
Howards Cams American Muscle Hydraulic Roller Tappet Camshafts
Howards Cams American Muscle hydraulic roller tappet camshafts are designed as near-duplicates of the most iconic OE camshaft grinds. Howards took these fantastic grinds and made slight changes to the ramp speeds—and minor duration changes for better reliability and horsepower. They provide the same throttle response and the original-style exhaust rumble. Howards Cams manufactures American Muscle hydraulic roller tappet camshafts on dedicated, high-precision cam grinding machines to strict tolerances. Each cam is 100 percent Rockwell checked and Parkerized, ensuring the highest quality. Select the model and performance options that best suit your vehicle application.
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Some parts are not legal for use in California or other states with similar laws / regulations
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