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.
| Type | BC1310 Dual |
| Free Length | 1.671″ |
| Seat | 1.320″ @ 98 lbs |
| Open | 0.850″ @ 226 lbs |
| Coil Bind | 0.795″ |
| Retainer | BC2305-24 |
| Spring Seat | BC2935 |
| Net Cam Lift | 0.470″ / 11.94mm |




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