Buick/Oldsmobile 215-300-340 Rover 215-240-256
Advertised Duration: 257/269
Duration @ .050": 203/215
Valve Lift w/1.60 Rockers: .443/.475
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: Hyd./Hyd.
1000-4000. Smooth idle, strong low end performance.

Buick/Oldsmobile 215-300-340 Rover 215-240-256
Advertised Duration: 269/269
Duration @ .050": 215/215
Valve Lift w/1.60 Rockers: .475/.475
Lobe Separation Angle: 112
Intake Centerline: 108
Valve Lash: Hyd./Hyd.
1400-4400. Good idle, improved low & mid range power, great all around performances.

Buick/Oldsmobile 215-300-340 Rover 215-240-256
Advertised Duration: 269/275
Duration @ .050": 215/221
Valve Lift w/1.60 Rockers: .475/.501
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: Hyd./Hyd.
1500-4600. Good idle, strong low & mid range torque & horsepower.

Buick/Oldsmobile 215-300-340 Rover 215-240-256
Advertised Duration: 275/275
Duration @ .050": 221/221
Valve Lift w/1.60 Rockers: .501/.501
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: Hyd./Hyd.
2000-5000. Fair idle, strong mid range performance.

Buick/Oldsmobile 215-300-340 Rover 215-240-256
Custom Grind