COMP Cams Valve Seals (521-1) . COMP Cams Valve Seal 3/8 Viton Metal Bo.
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Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 521 seal has a .545" OD and fits applications with 3/8" valves and .500" OD guides.
IN STOCK Supertech VS-TY5E-12Supertech Valve Stem Seals Supertech Toyota Yaris / Echo 4AGE 20V 5mm Viton Exhaust / Intake Valve Stem Seal - Set of 12 $26.48 SALE
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IN STOCK GSC Power Division 1023GSC Power Division Valve Stem Seal Sets GSC P-D Subaru FA20 Viton 6mm Valve Stem Seal Set $34.90
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IN STOCK GSC Power Division 1002GSC Power Division Valve Stem Seal Sets GSC P-D 4G63T Evo 1-9 / 90-98 DSM Viton 6.6mm Valve Stem Seal Set $34.90
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IN STOCK Supertech VS-N6I-12Supertech Valve Stem Seals Supertech SR20DE/SR20DET/RB26 6mm Intake Valve Stem Seal - Set of 12 $23.42 SALE
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IN STOCK Supertech VS-N7E-8Supertech Valve Stem Seals Supertech Nissan 7mm Viton Valve Stem Seal - Set of 8 $23.16 SALE
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IN STOCK Supertech VS-H6.6E-8Supertech Valve Stem Seals Supertech Honda LS / Mitsubishi (Reduced Dia) 6.6mm Viton Exhaust Valve Stem Seal - Set of 8 $23.16 SALE
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IN STOCK GSC Power Division 1031GSC Power Division Valve Stem Seal Sets GSC P-D Toyota MR-2 3SGTE Viton 6mm Valve Stem Seal Set $34.90
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IN STOCK - LOW Supertech VS-T5.5-E-6Supertech Valve Stem Seals Supertech Toyota G16E-GR Exhaust Valve Stem Seal - Set of 6 $21.54 SALE
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For more information on COMP Cams part number 521-1, you can visit the official COMP Cams website.