GKTECH SR20 ROCKER ARM STOPPERS / RAS (Order in)NOTE: This item is specially ordered from GKTECH Australia and usually takes around 3 4 weeks to arrive. Listing is for: 1x SR20 Rocker arm Stopper (Pair)Used for extra reliability at high RPM in SR engines. These rocker arm stoppers hold the lash adjuster side of the rocker arm at a fixed clearance, preventing extra movement at high RPM. Laser Cut Mild Steel and Zinc coated MADE IN AUSTRALIA. Suits: NISSAN S13 SR20 180SX S13 SR20 SILVIA S14 200SX