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Technical Articles for Part Number HRS-120453-12
Howards Cams Big Bottle Nitrous Oxide Mechanical Roller Camshafts 120453-12
Part Number: HRS-120453-12
Howards Cams Big Bottle Nitrous Oxide Mechanical Roller Camshafts
Camshaft, Mechanical/Solid Roller Tappet, Retro Fit, Advertised Duration 299/311, Lift 0.714/0.725 in., 112 LSA, 108 Intake CL, Chevy, Big Block, Each
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Estimated Ship Date: Dec 31, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
120453-12
Part Type:
Product Line:
Summit Racing Part Number:
HRS-120453-12
UPC:
840793105489
Cam Style:
Solid roller, Retro-fit
Camshaft Use:
Drag race
Camshaft Manufacturers Description:
Rough idle, aggressive upper rpm horsepower. 250+ plate system, 11.0:1+ compression ratio.
Basic Operating RPM Range:
4,000-7,000
Intake Duration at 050 inch Lift:
267
Exhaust Duration at 050 inch Lift:
279
Duration at 050 inch Lift:
267 int./279 exh.
Advertised Intake Duration:
299
Advertised Exhaust Duration:
311
Advertised Duration:
299 int./311 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.714 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.725 in.
Valve Lift with Factory Rocker Arm Ratio:
0.714 int./0.725 exh.
Lobe Separation (degrees):
108
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.
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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