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Technical Articles for Part Number HRS-114513-12S
Howards Cams Big Bottle 4/7 Swap Nitrous Oxide Mechanical Roller Camshafts 114513-12S
Part Number: HRS-114513-12S
Howards Cams Big Bottle 4/7 Swap Nitrous Oxide Mechanical Roller Camshafts
Camshaft, Mechanical Roller Tappet, Advertised Duration 305/319, Lift .680/.650, Chevy, Small Block, Each
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Estimated Ship Date: Nov 19, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
114513-12S
Part Type:
Product Line:
Summit Racing Part Number:
HRS-114513-12S
UPC:
840793104185
Cam Style:
Solid roller, Retro-fit
Camshaft Use:
Drag race
Camshaft Manufacturers Description:
Small base circle. Competition, 400+ cu. in., mid to upper-end power. Multi-stage nitrous system.
Basic Operating RPM Range:
4,400-8,200
Intake Duration at 050 inch Lift:
273
Exhaust Duration at 050 inch Lift:
287
Duration at 050 inch Lift:
273 int./287 exh.
Advertised Intake Duration:
305
Advertised Exhaust Duration:
319
Advertised Duration:
305 int./319 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.680 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.650 in.
Valve Lift with Factory Rocker Arm Ratio:
0.680 int./0.650 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. Special 4/7 swap firing order. Requires the use of a composite or bronze distributor gear.
Howards Cams Big Bottle 4/7 Swap Nitrous Oxide Mechanical Roller Camshafts
Cubes on juice need Big Bottle 4/7 swap 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. The 4 and 7 swap firing order cams feature a 1-8-7-3-6-5-4-2 firing order pattern. What does that mean, exactly? It means moving the power stroke for cylinder 4 to where 7 used to be, and vice versa, and you have just changed the engine's firing order pattern to create more power. Are you looking for maximum performance? Match your N2O with these bottle-built Big Bottle 4/7 nitrous oxide mechanical roller camshafts from Howards Cams and enjoy the ride!
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