Designed for up to 9000 rpm and 800whp, 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
BC1300 Single

Free Length
1.690"

Seat
1.325" @ 80 lbs

Open
0.980" @ 158 lbs

Coil Bind
0.810"

Retainer
BC2300S-24

Spring Seat
OEM

Net Cam Lift
0.460" / 11.68mm