14mm Hard CORE Head Stud Upgrade for Subaru EJ and FA Series EnginesHCR 14mm Head Studs offer enhanced engine reliability, making them an excellent choice for racers pushing beyond 500hp. Our improved thread design, tested extensively, ensures optimal clamping of cylinder heads to the block assembly, minimizing the risk of head lift under high boost conditions. Contact Us For more information or to discuss your specific requirements, please reach out to us. Were here to provide the necessary modifications and ensure
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14mm Hard CORE Head Stud Upgrade for Subaru EJ and FA Series Engines