Designed for modified engines. Requires BC valve spring kit, seals and guides for clearance due to high lift. Must run with aftermarket pistons with proper valve reliefs built-in. Cannot be ran with stock/OE pistons due to possible piston to valve contact.

Adv Dur (.020")
265°/265°

Dur @ .050
240°/240°

Valve Lift (1:1)
.450"/.450"

Valve Lift (mm)
11.43/11.43