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Technical Articles for Part Number HRS-110613-12S
Howards Cams Big Bottle Nitrous Oxide Mechanical Roller Camshafts 110613-12S
Part Number: HRS-110613-12S
Howards Cams Big Bottle Nitrous Oxide Mechanical Roller Camshafts
Camshaft, Mechanical Roller Tappet, Advertised Duration 291/307, Lift .640/.630, Chevy, Small Block, Each
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Estimated Ship Date: Dec 31, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
110613-12S
Part Type:
Product Line:
Summit Racing Part Number:
HRS-110613-12S
UPC:
840793100828
Cam Style:
Solid roller, Retro-fit
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
Small base circle. Mid and upper rpm horsepower, 250+ plate system.
Basic Operating RPM Range:
3,600-7,600
Intake Duration at 050 inch Lift:
259
Exhaust Duration at 050 inch Lift:
275
Duration at 050 inch Lift:
259 int./275 exh.
Advertised Intake Duration:
291
Advertised Exhaust Duration:
307
Advertised Duration:
291 int./307 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.640 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.630 in.
Valve Lift with Factory Rocker Arm Ratio:
0.640 int./0.630 exh.
Lobe Separation (degrees):
112
Camshaft Gear Attachment:
3-bolt
Intake Valve Lash:
0.022 in.
Exhaust Valve Lash:
0.022 in.
Remanufactured:
No
Computer-Controlled Compatible:
No
Valve Springs Required:
Yes
Quantity:
Sold individually.
Notes:
Small base circle cam.
Howards Cams Big Bottle Nitrous Oxide Mechanical Roller Camshafts
Cubes on juice need Big Bottle cams from Howards Cams! Their nitrous oxide mechanical roller camshafts offer precision-ground, high-grade, race-quality cores to ensure top performance. These Howards nitrous cams are serious cams for serious street to all-out racing applications engineered with custom-designed lobes for 250 hp and above. Are you looking for maximum performance? Match your N2O with these bottle-built Big Bottle nitrous oxide mechanical roller camshafts from Howards Cams and enjoy the ride!
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Some parts are not legal for use in California or other states with similar laws / regulations
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