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 | 1.866" |
| Seat | 1.325" @ 82 lbs |
| Open | 0.925" @ 180 lbs |
| Coil Bind | 0.730" |
| Retainer | BC2305-24 |
| Spring Seat | BC2935 |
| Net Cam Lift | 0.470" / 11.94mm |