Manley Subaru WRX/STI 16pc Valve Springs (1.050/.755) (for use with 23180-16 Retainers)$131.89 $138.83
GSC P-D Ford Raptor/Platinum/Limited Ecoboost 3.5L H.O. Conical Valve Spring and Ti Retainer Kit$620.50 $730.00
GSC P-D Nissan RB26DETT Shimless Conical Valve Spring & Ti Retainer Kit ( Max Boost PSI 50)$824.80 $970.35
GSC P-D Ford Mustang 5.0L Coyote Gen 1/2 High Pressure Conical Valve Spring & Ti Retainer Kit$815.15 $959.00
GSC P-D Ford Mustang 5.0L Coyote Gen 1/2 Conical Valve Spring and Titanium Retainer Kit$765.00 $900.00
GSC P-D Toyota 2JZ-GTE / Nissan VR38DETT 1mm Thick 27.56mm OD 18.4mm ID Spring Seat Kit (Set of 24)$20.40 $24.00