15% GSC P-D Nissan RB26DETT Extreme Shimless Conical Valve Spring & Ti Retainer Kit (Max Boost PSI 90) GSC Power Division Sale! from 99480 117035 /per Qty. Add to Cart This item is either made to order or has limited inventory. Please reach out to confirm lead times if needed. GSC P-D Nissan RB26DETT Extreme Shimless Conical Valve Spring & Ti Retainer Kit (Max Boost PSI 90)