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Isky PSI sportsman drag race valve springs are manufactured from high-strength alloy steel, for dependable performance you can trust. PSI (Performance Springs Inc.) is quite simply one of the modern racing industry's top manufacturers of racing-only valve springs. In the past few years, more professional racing championships, from Winston Cup and IRL to NHRA Pro Stock, have been won using PSI valve springs than any other brand. Do not settle for those foreign-made springs of lesser quality. Insist on genuine PSI Drag Race Valve Springs and get into the winners circle!
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$389.99
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