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Suit Ls with dual valve springs and stock powdered metal guides.
Valve Stem Seal 0.313in Valve Stem 0.546in OD Viton Set of 16
Brian Tooley Racing (BTR) is a leading developer of high-performance valvetrain and induction components for modern GM pushrod engines. Built on in-house engineering, rigorous testing, and continuous innovation, BTR delivers reliable, race-proven parts designed to maximize power, durability, and value.