Manley Nissan SR20DE/SR20DET Valve Spring and Retainer Kit (with Valve - 26165K

About Product Additional Details About the Brand Vehicle Fitment Product Videos Manley Nissan SR20DE/SR20DET Valve Spring and Retainer Kit (with Valve Locks)Manley Valve Spring Kit, KIT-SPRING/RETAINER/LOCK. Whether its for a full rebuild or some standard maintenance, the proper engine components are needed to make sure your vehicle is running smooth. Upgrading your valve springs and retainers is the best way to help your car rev higher. If you are looking to increase the horsepower of your engine, your may have considered rebuilding the head. When rebuilding your engine's head, we recommend upgrading your valves, and springs. This will increase airflow and the RPM of your engine. Additional Details WARNING: Cancer & Reproductive Harm. For more information, go to www.P65Warnings.ca.gov About Manley Performance In March, 1966, Manley Speed Equipment, Inc. was founded by Hank Manley shortly after his graduation from Brown University. His interest in performance and racing trac