The Roger Clark Motorsoprts 11mm Performance Head Stud Kit is highly recommended for any new or rebuilt engine.
Manufactured from S99 Steel with a certified minimum yield strength of 1080 MPa, RCM's new Performance Studs offer a substantially greater force on your cylinder head gaskets when compared to the O. E cylinder head bolts. With a greater pressure placed on your cylinder heads (and in turn your cylinder head gaskets) this greatly reduces the chance of head movement under boost, keeping your precious head gaskets stable and allowing them to continue providing an effective seal from cylinder chambers, oil and waterways.
**This kit is designed to meet or excede the performance of the ARP 2000 head studs.
Founded in the early 1991 by multiple RAC winner and British Rally Champion Roger Clark MBE, Roger Clark Motorsport is one of the UK's (and for that matter, global rally's) premier motorsport and product development specialists and tuners. Roger Clark Motorsport specialize in the Impreza platform (the car-of-choice for their unparalleled Time Attack Cars Gobstopper I, Gobstopper II and soon Gobstopper III), and have passed on these high-performance components to the consumer market. We are incredibly proud to be one of the only U.S. distributors able to offer these exceptional Roger Clark Motorsports parts.