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Technical Articles for Part Number HRS-112561-12
Howards Cams Street Force 1 Hydraulic Flat Tappet Camshafts 112561-12
Part Number: HRS-112561-12
Howards Cams Street Force 1 Hydraulic Flat Tappet Camshafts
Camshaft, Street Force 1, Hydraulic Flat Tappet, Advertised Duration 259/269, Lift .420/.455, Chevy, Small Block, Each
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Estimated Ship Date: Dec 29, 2026 Would you rather pick it up?
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Overview
Brand:
Manufacturer's Part Number:
112561-12
Part Type:
Product Line:
Summit Racing Part Number:
HRS-112561-12
UPC:
840793102723
Cam Style:
Hydraulic flat tappet
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
Smooth idle, street, towing, good fuel economy.
Basic Operating RPM Range:
1,000-5,000
Intake Duration at 050 inch Lift:
205
Exhaust Duration at 050 inch Lift:
215
Duration at 050 inch Lift:
205 int./215 exh.
Advertised Intake Duration:
259
Advertised Exhaust Duration:
269
Advertised Duration:
259 int./269 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.420 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.455 in.
Valve Lift with Factory Rocker Arm Ratio:
0.420 int./0.455 exh.
Lobe Separation (degrees):
112
Camshaft Gear Attachment:
3-bolt
Remanufactured:
No
Computer-Controlled Compatible:
No
Valve Springs Required:
Yes
Quantity:
Sold individually.
Howards Cams Street Force 1 Hydraulic Flat Tappet Camshafts
Howards Cams Street Force 1 hydraulic flat tappet camshafts were designed for the street performance enthusiast. These camshafts feature true street performance with little or no added maintenance. The specially designed grinds were created to provide good idle, mild street performance, and strong low-end torque. Street Force 1 camshafts work best with a dual-plane intake manifold and dual exhaust. The camshafts also feature 112 degree lobe separations to help maintain vacuum. They're available for countless year/make and engine applications. For premier street performance, choose Howards Cams.
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Some parts are not legal for use in California or other states with similar laws / regulations
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