Valve Springs, Retainers

GSC P-D Porsche 991 Turbo Conical Spring Set

GSC P-D Nissan GTR VR38DETT Single Conical Valve Spring & Titanium Retainer Kit (Race Only)

GSC P-D Nissan RB26DETT/RB26 Cylindrical Valve Spring Kit

GSC P-D 12+ Subaru BRZ / Scion FR-S Single Spring Chromoly Seat and Titanium Retainer Kit

GSC P-D Toyota 2JZGTE/2JZGE/VVTI Variants Valve Spring Kit (set of 24)

GSC P-D Subaru EJ Turbo DOHC Valve Spring & Ti Retainer Kit

GSC P-D Mitsubishi 4G63T High Pressure Conical Valve Spring and Ti Retainer Kit

GSC P-D Mitsubishi 4G63T Extreme Pressure Conical Valve Spring and Ti Retainer Kit

GSC P-D 2017+ Audi RS3 DAZA Beehive Valve Spring and Ti Retainer Kit (60PSI Max Boost)

GSC P-D Nissan RB26DETT Shimless Conical Valve Spring & Ti Retainer Kit ( Max Boost PSI 50)

GSC P-D Nissan VR30DDTT HP Conical Valve Spring Ti Retainer & Seat Kit (10500RPM/55PSI Max)

GSC P-D Nissan VR30DDTT HP Conical Valve Spring Ti Retainer & Seat Kit (9500RPM/40PSI Max)

GSC P-D Nissan RB26DETT/RB26 Conical Valve Spring Kit

GSC P-D Toyota 3SGTE High Pressure Conical Valve Spring Kit w/Ti Retainer for Shimless/Shim-Over

GSC P-D Nissan VR38DETT High Pressure Conical Valve Spring Kit w/ Titanium Retainer

GSC P-D Nissan VR38DETT Conical Valve Spring Kit w/ TVS1903 Conical Spring

GSC P-D Mitsubishi 4B11T High Pressure Single Conical Valve Spring and Ti Retainer Kit

GSC P-D Single Beehive Spring Kit Titanium Retainers/Chromoly Seats 13-15 Scion FR-S / BRZ FA20

GSC P-D VQ35DE (Turbo High Rev) Beehive Valve Spring and Titanium Retainer Kit

GSC P-D K-series Vtec K20/K24 Beehive Valve Spring and Titanium Retainer Kit Higher REV

GSC P-D 2JZ Beehive Valve Springs w/ Titanium Retainer Valvetrain Kit (Use factory spring seats)

GSC P-D Subaru EJ257 Beehive Valve Spring & Ti Retainer Kit (Use w/OE Spring Seats)

GSC P-D Mitsubishi 4B11T Beehive Valve Springs & Ti Retainer Kit (Use w/OE Spring Seats)

GSC P-D Mitsubishi 4G63T Beehive Valve Springs & Ti Retainer Kit

GSC P-D Mitsubishi Evolution 1-9 4G63 Beehive Valve Springs & Ti Retainer Kit

GSC P-D 4G63T EVO 8-9 Stage 1 Beehive Valve Springs (Use Factory Retainers and Spring Seats)

GSC P-D Nissan RB26DETT High Pressure Shimless Conical Valve Spring & Ti Retainer Kit (Max PSI 60)

GSC P-D Audi R8 V10 / Lamborghini Huracan V10 5.2L Valve Spring & Ti Retainer Kit (w/Seats & Seals)