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.

SKU

54-465-11

$432.95

Grind Number: 305LRx 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 Cathedral Port Large Displacement

Camshaft Gear Attachment: 3-Bolt

Valve Springs Required: Yes

Camshaft Material: Billet Steel

California Proposition 65: WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

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 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: 39

Exhaust Open BBDC: 93

Intake Open BTDC: 39

Intake Close ABDC: 85

Component Part Number

Break-In Lube: 159

Specifications