Performance cylinder head stud, washer and nut set by ARP to suit Toyota 1HZ, 1HZ-T, 1HD-T series. These studs are 11mm, direct replacement for the OE bolts. No modification to head bolt holes in the block or head is required. This will help gain the increased head clamping required in performance applications. They will achieve a more evenly distributed and accurate torque load compared to that of head bolts by eliminating the twisting force created during tightening. This ultimately translates into higher reliability and a lower chance of head gasket failure.
ARP2000 material
(ARP brand – made in USA).
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