LSR Rectangular Port 251/267 Hydraulic Roller Cam for GM LS GEN III/IV
HYDRAULIC ROLLER-420+ci, high compression, high rpm, rectangular CNC-ported heads in race type applications.
54-474-11
Specifications
Engine Family: GM LS GEN III/IV 3-Bolt 8 Cylinder (1997-2015)
RPM Operating Range: 2,600-7,000
Grind Number: 301LRR HR15
Cam Type: Hydraulic Roller
Lifter Style: Hydraulic Roller
Camshaft Series: LSR Rectangular Port Large Displacement
Usage: Strip
Advertised Intake Duration: 301
Advertised Exhaust Duration: 317
Intake Duration at .050 Inch Lift: 251
Exhaust Duration at .050 Inch Lift: 267
Intake Valve Lift: 0.624
Exhaust Valve Lift: 0.624
Lobe Lift Intake: 0.367
Lobe Lift Exhaust: 0.367
Lobe Separation: 115
Intake Centreline: 112
Exhaust Close ATDC: 41
Intake Open BTDC: 37
Exhaust Open BBDC: 95
Intake Close ABDC: 83
Camshaft Gear Attachment: 3-Bolt