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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 |
Be the first to review “BC0983 – Polaris Pro R (21-up) Stage 3 Normally Aspirated Race Spec (pair)”
| Make | Model | Year |
|---|---|---|
| Polaris | Pro R | 2021 |
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