Description
400+c.i., high RPM applications with major modifications and rectangular port cylinder heads.
Resources
Installation Instructions
Specifications:
| Advertised Exhaust Duration | 313 |
| Advertised Intake Duration | 297 |
| Amazon ASIN | B002EE0FBY |
| Assembly Lubricant Included | No |
| Basic Operating RPM Range | 2,400-7,000 |
| C.A.R.B. E.O. Number | N/A |
| C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for On-Road Vehicles? | No |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? | Yes, but must be a race/competition only vehicle. |
| C.A.R.B. Exemption Reason | N/A |
| California Proposition 65 | WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
| Cam Type | Hydraulic Roller |
| Camshaft Gear Attachment | 3-Bolt |
| Camshaft Material | Billet Steel |
| Camshaft Series | LSR Rectangular Port Large Displacement |
| Description_ASM | Fits 4.8, 5.3, 5.7, 6.0, 6.2 and 7.0 Liter LS1, LS2, LS3, LS4, LS6, LS7 plus SUV and Truck Engines (Grinds are specific to displacement and cylinder head design) |
| Description_DEF | Engine Camshaft |
| Description_DES | LSR Rectangular Port 247/263 Hydraulic Roller Cam for GM LS GEN III/IV |
| Description_EXT | 400+c.i., high RPM applications with major modifications and rectangular port cylinder heads. |
| Description_INV | LSR Rect Port 247/263 H-Rlr Cam GM LS |
| Description_KEY | GM, 4.8, 5.3, 5.7, 6.0, 6.2, 7.0, LS1, LS2, LS3, LS4, LS6, LS7, LSA, LS9, Camaro, Silverado, LS Swap, 383, 350, SBC, Chevelle, Yukon, L92, LM7, 325, GMC, Trailblazer, Corvette, GM LS, GEN III, GEN 3, GEN IV, GEN 4, DOD, AFM, VVT, BTR, Texas Speed |
| Description_SHO | LSR 247/263 HRlrLS |
| Description_SHP | None |
| Engine Family | GM LS GEN III/IV 3-Bolt 8 Cylinder (1997-2015) |
| Exhaust Duration at .050 inch Lift | 263 |
| Exhaust Valve Lift | 0.624 |
| Grind Number | 297LRR HR14 |
| height | 2.67 |
| Intake Duration at .050 Inch Lift | 247 |
| Intake Valve Lift | 0.624 |
| length | 23.3 |
| Lifter Type | Hydraulic Roller |
| Lifters Included | No |
| Lobe Separation | 114 |
| LTL | N |
| Title | LSR Rectangular Port 247/263 Hydraulic Roller Cam for GM LS GEN III/IV |
| Valve Springs Required | Yes |
| weight | 9.8 |
| width | 2.91 |
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