| Description_ASM |
Fits '87+ GEN 1 Chevrolet 305-350 Small Blocks w/ Factory Roller Camshafts (Not LT-1/LS1 etc) |
| Description_DEF |
Engine Camshaft |
| Description_DES |
4-Pattern 253/263 IB, 255/265 OB Hydraulic Roller Cam for OE Roller SBC |
| Description_INV |
4-Ptrn 253/263 H-Rlr Cam OE Roller SBC |
| Description_EXT |
Recommended in larger c.i. and high compression applications. 3500+ Stall. |
| 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_SHO |
4Pt 253/263 HRlr SBC |
| Description_SHP |
None |
| Advertised Inboard Exhaust Duration |
317 |
| Camshaft Material |
Billet Steel |
| Inboard Intake Duration at .050 Inch Lift |
253 |
| C.A.R.B. Exempt for On-Road Vehicles? |
No |
| Assembly Lubricant Included |
No |
| Title |
4-Pattern 253/263 IB, 255/265 OB Hydraulic Roller Cam for OE Roller SBC |
| Engine Family |
Chevrolet 305-350 c.i. 8 Cylinder O.E. Roller (1987-1998) |
| Basic Operating RPM Range |
3,300-7,500 |
| Amazon ASIN |
N/A |
| Outboard Exhaust Duration at .050 Inch Lift |
265 |
| Valve Springs Required |
Yes |
| Outboard Exhaust Valve Lift |
0.622 |
| Cam Type |
Hydraulic Roller |
| C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| Usage |
Street/Performance |
| Advertised Inboard Intake Duration |
305 |
| C.A.R.B. Exemption Reason |
N/A |
| Grind Number |
305QIO8 |
| Camshaft Gear Attachment |
3-Bolt |
| Camshaft Series |
4-Pattern |
| Inboard Intake Valve Lift |
0.638 |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? |
Yes, but must be a race/competition only vehicle. |
| Lifter Type |
Hydraulic Roller |
| C.A.R.B. E.O. Number |
N/A |
| Outboard Intake Duration at .050 Inch Lift |
255 |
| Advertised Outboard Intake Duration |
307 |
| Inboard Exhaust Valve Lift |
0.622 |
| Lifters Included |
No |
| C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| Advertised Outboard Exhaust Duration |
319 |
| California Proposition 65 |
WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
| Inboard Exhaust Duration at .050 Inch Lift |
263 |
| Outboard Intake Valve Lift |
0.638 |
| C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| Length |
3.0000 |
| Width |
3.0000 |
| Height |
25.0000 |
| Weight |
9.0000 |
