LSR Rectangular Port 255/271 Hydraulic Roller Cam for GM LS GEN III/IV

HYDRAULIC ROLLER-440+ci, purpose built applications focusing on power above 6000 rpm with cathedral port heads.

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Grind Number: 305LRR HR15
Engine Family: GM LS GEN III/IV 3-Bolt 8 Cylinder (1997-2015)
RPM Operating Range: 2,800-7,200
Cam Type: Hydraulic Roller
Lifter Style: Hydraulic Roller
Camshaft Series: LSR Rectangular Port Large Displacement
Camshaft Gear Attachment: 3-Bolt
Usage: Strip
Valve Springs Required: Yes
Camshaft Material: Billet Steel
California Proposition 65: WARNING: Cancer and Reproductive Harm
Advertised Intake Duration: 305
Advertised Exhaust Duration: 321
Intake Duration at .050 Inch Lift: 255
Exhaust Duration at .050 Inch Lift: 271
Intake Valve Lift: 0.624
Exhaust Valve Lift: 0.624
Lobe Separation: 115
Assembly Lubricant Included: No
Intake Centerline: 112
Lobe Lift Intake: 0.367
Lobe Lift Exhaust: 0.367
Valve Timing @ 0.006 Lift:
Exhaust Close ATDC: 43
Exhaust Open BBDC: 97
Intake Open BTDC: 39
Intake Close ABDC: 85
Component Part Number
Break-In Lube: 159