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Part Number: 271257/265
Grind Number: RR-257/265
Lifter Type: Hydraulic Roller
Engine Family: LS1
1997-On, Vortec 1990-On
4800-5300, 6000
Cam
Family: Hydraulic Roller
Excellent performance cam with good vacuum, good idle. 3.08-3.73 axle ratio, 9.5:1 comp. Up to 650 CFM Carb. Computer compatible. Stock converter.
SpecificationsRPM
Range: 1400-5600
Lobe
Separation Angle: 113°
Valve Lash: Intake .000". /
Exhaust .000".
Advertised
Duration: Intake 257° /
Exhaust 265°
Duration
@ .050" Lift: Intake 212°
/ Exhaust 220°
Valve
Lift: Intake .510" / Exhaust
.530"