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Technical Articles for Part Number HRS-221133-12
Howards Cams Big Bottle Nitrous Oxide Mechanical Roller Camshafts 221133-12
Part Number: HRS-221133-12
Howards Cams Big Bottle Nitrous Oxide Mechanical Roller Camshafts
Camshaft, Mechanical Roller Tappet, Advertised Duration 287/299, Lift .640/.640, Ford, 351W, Each
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Estimated Ship Date: Dec 28, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
221133-12
Part Type:
Product Line:
Summit Racing Part Number:
HRS-221133-12
UPC:
840793110445
Cam Style:
Solid roller, Retro-fit
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
Fair idle, performance/strip with plate system, great midrange. 11.5:1+ compression ratio, 3,500+ stall.
Basic Operating RPM Range:
3,000-6,800
Intake Duration at 050 inch Lift:
255
Exhaust Duration at 050 inch Lift:
267
Duration at 050 inch Lift:
255 int./267 exh.
Advertised Intake Duration:
287
Advertised Exhaust Duration:
299
Advertised Duration:
287 int./299 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.640 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.640 in.
Valve Lift with Factory Rocker Arm Ratio:
0.640 int./0.640 exh.
Lobe Separation (degrees):
112
Camshaft Gear Attachment:
1-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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