ISR Performance Rocker Arm Stoppers - Nissan SR20DET

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ISR Performance Rocker Arm Stoppers - Nissan SR20DET ISR Stainless Steel rocker arm stoppers for the RWD SR20DET. Unlike the mild steel HKS or Greddy ones, these stainless RAS will not chip nor rust under extensive use and abuse. RAS fit directly on S13, but can be used on all S14/S15 SR model too but needs to trim and cut out some materials underneath the valve cover near the oil cap area that hits the RAS. ** ** Legal only for use in competition vehicles which may never be registered, licensed