Supertech Dual Valve Spring Kit w/ Titanium Retainers Nissan Skyline RB25 DOHC w/Solid Lifters | SPRK-TS1015-RB25 Impreza_2008-2011 AVS® Ventvisors come backed by

AVS® Ventvisors come backed by a limited lifetime warranty

More durable than factory rubber bushings

and Autocross & Track Events

Part number: S1-1895-15-5x114

and customer support to help you get the best results

Supertech Dual Valve Spring Kit w/ Titanium Retainers Nissan Skyline RB25 DOHC w/Solid Lifters | SPRK-TS1015-RB25 Impreza_2008-2011 AVS® Ventvisors come backed byOverview The Supertech SPT Dual Valve Spring Kit (SPRK TS1015 RB25) is a high performance valve spring upgrade engineered specifically for the Nissan Skyline RB25 DOHC 24 valve engine equipped with solid lifters. Designed for serious performance builds, forced induction applications, and high rpm race engines, these dual valve springs provide dramatically increased spring pressure and improved valve control far beyond OEM specifications. Whether