Dual Valve Spring Kit by Supertech. Nissan Skyline 1989-2002. Solid Lifter Conversion; Springs: SPR-TS1015/RB25 (24); Retainers: NVG1015/T1 (24); Seat: SEAT-RB25 (12) + SEAT-RB25-E (12).
- Seat Pressure: 83lbs; 35.00mm
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