Single Valve Spring Set Suit Mitsubishi 4G63

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 processingprocedures for consistent pressures.

Seat: 1.550" @ 84 lbs
Open: 1.000" @ 235 lbs
Coil Bind: 0.935"
No machine work required