New
Normal
Street/strip roller
Suit stroker engine
Good bottom end torque
Soft on valve springs
See fitting notes
| RPM Range | Part No. | Duration | with 1.62 Rocker | Lobe Sep Angle | Lash | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Advertised | @.050” | |||||||||
| IN | EX | IN | EX | IN | EX | IN | EX | |||
| 4500 - 7500 | 621576 | 307° | 310° | 276° | 278° | 0.608 | 0.608 | 108 | .016" | .016" |
Must use performance springs.
Must use performance retainers.
Machining required to fit these components.
Must use performance seal.
Check valve train geometry to establish length before ordering pushrods.
Converter stall speed should be equal to or greater than the minimum RPM of the cam power range