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  • The Nissan SR20 GTiR Head takes a plain 6.0mm id cap shim on one side, and a Rocker Guide cap shim on the other side of the rocker arm.

     

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  • The Nissan SR20 GTR Head Takes a 10.0mm dia flat shim on one side, and a flat bottom Rocker Guide shim on the other side of the rocker arm

     

  • The Nissan SR20 VE Head Takes 10.0mm dia Flat shims on both sides of the rocker arm.