| Description_ASM |
Fits Chevrolet GEN 1 Small Blocks including the 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400. Does not fit LT1/LT4, or factory roller Small Blocks built from 1985 and newer. GM gradually added roller camshafts to 305's and 350's from the mid 80's forward. Camaros/Firebirds/Corvettes received the roller cams early, but many trucks and SUV's had flat tappet cams until the mid 90's. Remove the intake or timing cover to confirm whether the block is a factory roller or flat tappet. Does not fit the LS1, LS2, LS3 or any LS-based 4.8, 5.3, 5.7, 6.0 and 6.2. 1955-1957 Chevrolet 265 engines require a groove on the 5th cam journal for oiling. Contact us for more information. |
| Description_DEF |
Engine Camshaft |
| Description_DES |
4-Pattern 241/251 IB, 243/253 OB Hydraulic Roller Cam for Chevrolet Small Block |
| Description_KEY |
265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10 |
| Description_EXT |
Excellent for street/strip applications with good heads and raised compression in high RPM engines. 3200+ Stall. |
| Description_INV |
4-Pattern 241/251 IB H-Roller Cam SBC |
| Description_SHP |
None |
| Description_TRA |
Warning: Camshaft Optimized for use with a Melanized or Nitrided distributor gear. Not compatible with cast or steel gears without similar surface treatments. Failure to utilize the proper distributor gear will void all warranties and/or return policies |
| Description_SHO |
4Pt 241/251 HRlr SBC |
| Advertised Inboard Exhaust Duration |
305 |
| Camshaft Material |
Billet Steel |
| Title |
4-Pattern 241/251 IB, 243/253 OB Hydraulic Roller Cam for Chevrolet Small Block |
| C.A.R.B. Exempt for On-Road Vehicles? |
No |
| Grind Number |
293QIO8 |
| Valve Springs Required |
Yes |
| Engine Family |
Chevrolet 262-400 c.i. 8 Cylinder (1958-1998) |
| Outboard Exhaust Valve Lift |
0.622 |
| Outboard Exhaust Duration at .050 inch Lift |
253 |
| Basic Operating RPM Range |
2900-7,200 |
| Assembly Lubricant Included |
No |
| C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| Cam Type |
Hydraulic Roller |
| Inboard Intake Duration at .050 Inch Lift |
241 |
| Advertised Inboard Intake Duration |
293 |
| Outboard Intake Valve Lift |
0.638 |
| Usage |
Street/Strip |
| C.A.R.B. Exemption Reason |
N/A |
| Amazon ASIN |
B00CWZW4BY |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? |
Yes, but must be a race/competition only vehicle. |
| Camshaft Series |
4-Pattern |
| Outboard Intake Duration at .050 Inch Lift |
243 |
| California Proposition 65 |
WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
| C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| Camshaft Gear Attachment |
3-Bolt |
| C.A.R.B. E.O. Number |
N/A |
| Inboard Exhaust Valve Lift |
0.622 |
| C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| Inboard Exhaust Duration at .050 inch Lift |
251 |
| Lifters Included |
No |
| Lifter Type |
Hydraulic Roller |
| Advertised Outboard Exhaust Duration |
307 |
| Advertised Outboard Intake Duration |
295 |
| Inboard Intake Valve Lift |
0.637 |
| Length |
3.0000 |
| Width |
7.0000 |
| Height |
12.0000 |
| Weight |
9.0000 |
