LSR Cathedral Port 255/263 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.

Available Soon
Available Soon items may take 2-4 weeks for delivery.
Camshaft Material:
Valve Springs Required:
Assembly Lubricant Included:
Engine Family: GM LS GEN III/IV 3-Bolt 8 Cylinder (1997-2015)
RPM Operating Range: 2,800-7,200
Grind Number: 305LRx HR15
Cam Type: Hydraulic Roller
Lifter Style: Hydraulic Roller
Camshaft Series: LSR Cathedral Port Large Displacement
California Proposition 65: WARNING: Cancer and Reproductive Harm
Advertised Intake Duration: 305
Advertised Exhaust Duration: 313
Intake Duration at .050 Inch Lift: 255
Exhaust Duration at .050 Inch Lift: 263
Intake Valve Lift: 0.624
Exhaust Valve Lift: 0.624
Lobe Lift Intake: 0.367
Lobe Lift Exhaust: 0.367
Lobe Separation: 115
Intake Centerline: 112
Exhaust Close ATDC: 39
Intake Open BTDC: 39
Exhaust Open BBDC: 93
Intake Close ABDC: 85
Camshaft Gear Attachment: 3-Bolt
Component Part Number
Break-In Lube: 159