Quick view Supertech Supertech Dual Valve Spring Kit - Nissan Skyline GTR 1989-02 RB26 Valve springs are made with premium Superclean Chrome Silicon Vanadium Steel alloy for higher performance & durability at high rpms and better memory.Computer designed to ensure that wire stress... ៛2,353,986.04 ៛2,942,513.41 Add to Cart