LSR Rectangular Port 231/247 Hydraulic Roller Cam for GM LS GEN III/IV

HYDRAULIC ROLLER-Very wide power range and excellent midrange torque for LS engines with rectangular port cylinder heads.

Grind Number: 281LRR HR-13
Engine Family: GM LS GEN III/IV 3-Bolt 8 Cylinder (1997-2015)
RPM Operating Range: 2,000-7,000
Cam Type: Hydraulic Roller
Lifter Style: Hydraulic Roller
Camshaft Series: LSR Rectangular Port All Out Power
Camshaft Gear Attachment: 3-Bolt
Valve Springs Required: Yes
Camshaft Material: Billet Steel
California Proposition 65: WARNING: Cancer and Reproductive Harm
Advertised Intake Duration: 281
Advertised Exhaust Duration: 297
Intake Duration at .050 Inch Lift: 231
Exhaust Duration at .050 Inch Lift: 247
Intake Valve Lift: 0.617
Exhaust Valve Lift: 0.624
Lobe Separation: 113
Assembly Lubricant Included: No
Intake Centerline: 109
Lobe Lift Intake: 0.363
Lobe Lift Exhaust: 0.367
Valve Timing @ 0.006 Lift:
Exhaust Close ATDC: 32
Exhaust Open BBDC: 84
Intake Open BTDC: 30
Intake Close ABDC: 70
Component Part Number
Break-In Lube: 159
Lifter Kit: 850-16