Kelford Hydraulic Lifter & Rocker Retainer KitKelford Cams is now stocking the Denstoj Auto Centre hydraulic lifters and rocker arm retainer kit for Nissan SR20DE SR20DET engines. Denstoj have cleverly developed these lifters to include a retaining clip to prevent the rocker arm from detaching from an unpredicted valve event (misfire, over rev, limit, etc). The rocker retainer clip simply clicks onto the OEM rocker arm. These lifters have been machined to accept the retaining clip. It is