Chevrolet Small Block
Adv. Duration: 280/284
Duration @ .050": 227/231
Lift: .390/.410
Lobe Separation: 108 LC
Included Lifters: 91112 Hyd. Flat Tappet
3200-6000. Oval Track Lift Rule, Stock Lift Rule. Best on 1/4 to 3/8 mile tracks. Strong lower mid-range power.

Chevrolet Small Block
Adv. Duration: 284/284
Duration @ .050": 231/231
Lift: .450/.450
Lobe Separation: 106 LC
Included Lifters: 91112 Hyd. Flat Tappet
2500-6600. Oval Track Lift Rule, .450" Lift Rule. Strong low & mid-range power. Banked 1/4-3/8 mile tracks.

Chevrolet Small Block 
Adv. Duration: 284/284
Duration @ .050": 231/231
Lift: .450/.450
Lobe Separation: 110 LC
Included Lifters: 91112 Hyd. Flat Tappet
2400-6800. Oval Track Lift Rule, .450” Lift Rule. Strong mid-range horsepower.

Chevrolet Small Block
Adv. Duration: 284/284
Duration @ .050": 231/231
Lift: .450/.450
Lobe Separation: 112 LC
Included Lifters: 91112 Hyd. Flat Tappet
2400-6800. Oval Track Lift Rule, .450” Lift Rule & Vacuum Rule. Strong mid-range horsepower.

Chevrolet Small Block
Adv. Duration: 285/285
Duration @ .050": 231/231
Lift: .470/.470
Lobe Separation: 108 LC
Included Lifters: 91111 Hyd. Flat Tappet
2000-6200. Hot Street/Brackets, broad power range, strong top end.

Chevrolet Small Block
Adv. Duration: 285/285
Duration @ .050": 231/231
Lift: .470/.470
Lobe Separation: 110 LC
Included Lifters: 91111 Hyd. Flat Tappet
2000-6200. Fair idle, street machines with headers, gears & 2500+ stall.

Chevrolet Small Block
Adv. Duration: 285/285
Duration @ .050": 231/231
Lift: .480/.480
Lobe Separation: 106 LC
Included Lifters: 91111 Hyd. Flat Tappet
2800-6400. Rough idle, broad power band. Works well in heavy vehicles. Needs 3200+ stall.

Chevrolet Small Block
Adv. Duration: 285/285
Duration @ .050": 231/231
Lift: .480/.480
Lobe Separation: 108 LC
Included Lifters: 91111 Hyd. Flat Tappet
2800-6400. Fair idle. Broad power band. Works well in heavy vehicles.

Chevrolet Small Block
Adv. Duration: 285/285
Duration @ .050": 231/231
Lift: .480/.480
Lobe Separation: 110 LC
Included Lifters: 91111 Hyd. Flat Tappet
2600-6400. Fair idle, Hot Street/Strip performance. Needs headers, gears & 2500+ stall.

Chevrolet Small Block
Adv. Duration: 285/289
Duration @ .050": 231/235
Lift: .480/.488
Lobe Separation: 108 LC
Included Lifters: 91111 Hyd. Flat Tappet
2200-6200. Lopey idle, broad power band. Strong top end power.

Chevrolet Small Block
Adv. Duration: 285/289
Duration @ .050": 231/235
Lift: .480/.488
Lobe Separation: 108 LC
Included Lifters: 91111 Hyd. Flat Tappet
2200-6200. Small Base Circle. Lopey idle, broad power band. Strong top end power.

Chevrolet Small Block
Adv. Duration: 285/289
Duration @ .050": 231/235
Lift: .480/.488
Lobe Separation: 110 LC
Included Lifters: 91111 Hyd. Flat Tappet
2000-6000. Lopey idle, Strong mid-range. Good throttle response. 2400+ stall.