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Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. BC retainers are machined from premium 4140 chromoly steel alloy for “set it and forget it” wear characteristics. Beehive spring keeps retainer lightweight. Also requires BC3991 valve stem seals.
| Type | BC1900-2 Single |
| Free Length | 1.610″ |
| Seat | 1.265″ @ 83 lbs |
| Open | 0.850″ @ 197 lbs |
| Coil Bind | 0.760″ |
| Retainer | BC2901B-2 |
| Spring Seat | BC2911-2 |
| Net Cam Lift | 0.450″ / 11.43mm |
Be the first to review “BC0900B-2 – Polaris Pro-R Beehive Spring/Steel Retainer w/No Shim Capture/Seat Kit”
| Make | Model | Year |
|---|---|---|
| Polaris | Pro-R |
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