GKTech Nissan SR20DE/SR20DET Rocker Arm Stoppers / RAS

The GKTech Rocker Arm Stoppers (RAS) are a must-have upgrade for any SR20DE or SR20DET engine operating at high RPM or under heavy load. In aggressive driving, drifting, or track conditions, SR20 engines are known to suffer from valvetrain instability—leading to rocker arms being thrown from the head, especially when using aftermarket cams or high-revving tunes.

The GKTech RAS kit prevents rocker arm displacement by limiting excessive movement, providing a simple and cost-effective way to protect your valvetrain and maintain engine reliability.

Key Features:

• Prevents Rocker Arm Failure: Keeps rockers in place under high-RPM load

• Simple Bolt-On Protection: Installs without cylinder head modification

• High-Strength Steel Construction: Durable and reliable even in motorsport conditions

• Essential for Built or Hard-Driven SRs: Ideal for drift, grip, and turbo builds

Specifications:

• Material: Laser-cut and zinc-coated steel

• Install Time: ~30–45 minutes (requires valve cover removal)

• Design: Rigid one-piece stoppers with included hardware

Compatibility:

• Nissan SR20DE / SR20DET (RWD applications only)

  • S13 SR20DET (non-VCT)

  • S14/S15 SR20DET (VCT)

  • SR20DE (RWD variants)
    Not compatible with FWD SR engines

What’s Included:

• (2) Rocker arm stoppers (intake and exhaust sides)

• (1) Mounting hardware kit

• (1) Installation guide

Notes:

• Valve cover gasket reuse or replacement may be required

• Recommended for engines seeing 7000+ RPM or running aftermarket camshafts

• Can be used with OEM or aftermarket cam setups

Safeguard your SR build from valvetrain failure with GKTech’s Rocker Arm Stoppers—a small investment that could save your engine.