Subaru WRX STI VA 2015+ Swift Sport Springs – Spec R. Drops 1.0F/1.0R 4F914R. Sold in a set of four springs. Made in Japan. Swift Spec-R Springs are built for track duty. Swift Spec-R springs are designed at the upper limits of the OEM shock valving. Track tested and tuned for optimum performance yet comfortable enough for a daily driver. From HPDE events to SCCA competition, Swift Spec-R Sport Springs are made for the track enthusiast looking to take their vehicle to the next level. Swift Spec-R Sport Springs were engineered with 3 characteristics in mind – Modified ride height compared to Sport Springs to maximize optimal suspension geometry – Further increasing the spring rate to enhance overall performance. The increase in spring rate is based on the upper limits of the vehicles factory shock valving – Maintaining optimal comfort level for street use. Spec R springs are wound with the same engineering and material as our sports springs. With the exception of stiffer rates and slight change in ride height; you can expect the same characteristics as our sports springs.