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Rectangle Port
Cable BracketSuit Powerglide transmissions
Note: Suits 14mm spark plug thread only
Pro Seriesfits Ford SB/BB 289-460 (1985 & Earlier) 5/16-18 Thread
have a lip on the edge so you don't drive off the ramp and very lightweight
Valave SPring Shims 1.500" O.D, .645" I.D, .015" Thick CO4739-16 Product:Default Title Rectangle PortValave SPring Shims 1. 500" O. D, . 645" I. D, . 015" Thick 4739 16 CO4739 16 VALVE SPRING SHIMS, 1. 500" OD As with all other parts in the valvetrain, the area where the spring sits takes a beating. The old standard shims simply will not hold up to the extreme pressures and high rpm found in today's performance engines. COMP Cams offers this set of valve spring shims to solve this problem and eliminate failures.
US$ 355.00
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