Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
Technical Articles for Part Number HRS-121233-10
Howards Cams Steel Billet Mechanical Roller Camshafts 121233-10
Part Number: HRS-121233-10
Howards Cams Steel Billet Mechanical Roller Camshafts
Camshaft, Mechanical Roller Tappet, Advertised Duration 309/319, Lift .737/.737, Chevy, Big Block, Each
See More Specifications
|
Check the Fit
Estimated Ship Date: Oct 28, 2026 Would you rather pick it up?
Need It Sooner? We recommend these similar substitute parts:
Overview
Brand:
Manufacturer's Part Number:
121233-10
Part Type:
Product Line:
Summit Racing Part Number:
HRS-121233-10
UPC:
840793106141
Cam Style:
Solid roller, Retro-fit
Camshaft Use:
Drag race
Camshaft Manufacturers Description:
Works great in 496+ c.i.d. with high stall. Will work with nitrous oxide.
Basic Operating RPM Range:
4,200-7,800
Intake Duration at 050 inch Lift:
277
Exhaust Duration at 050 inch Lift:
287
Duration at 050 inch Lift:
277 int./287 exh.
Advertised Intake Duration:
309
Advertised Exhaust Duration:
319
Advertised Duration:
309 int./319 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.737 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.737 in.
Valve Lift with Factory Rocker Arm Ratio:
0.737 int./0.737 exh.
Lobe Separation (degrees):
110
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 Steel Billet Mechanical Roller Camshafts
Howards Cams steel billet mechanical roller camshafts are serious cams for serious performance. Cut from billet steel these high-grade, race-quality mechanical roller cams from Howards are ground on precision equipment to ensure awesome performance. Mechanical roller cams offer aggressive power for all-out competition. They're billet, they're Howards, and they're serious-- mechanical roller camshafts!
Applications
Loading...
Loading...
Questions & Answers
Ask a Question
What type of question would you like to submit?
I have a Customer Service question
(order, shipping, returns, protection plans, etc.). Customer Service Question
(order, shipping, returns, protection plans, etc.). Customer Service Question
- OR -
I would like to ask other customers
a question about this Product. Product Related Question
a question about this Product. Product Related Question
Loading...
Reviews Write a Review
Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
Modal Header
Call To Order
This is a custom order part. You can order this part by Contacting Us.
Email this page
