Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 521 seals have a .545" OD and fit applications with 3/8" valves and .500" OD guides.
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Sorry we do not have fitment information available for this part number. Contact us for any fitment questions. | |||||
IN STOCK Supertech VS-TY5E-8Supertech Valve Stem Seals Supertech Toyota Yaris / Echo 4AGE 20V 5mm Viton Exhaust / Intake Valve Stem Seal - Set of 8 $33.33
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IN STOCK GSC Power Division 1054GSC Power Division Valve Stem Seal Sets GSC P-D Nissan TB48DE Valve Stem Viton 7mm Seal - SET OF 24 $53.85
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IN STOCK GSC Power Division 1090GSC Power Division Valve Stem Seal Sets GSC P-D Toyota Supra/BMW B58/N54/S55/S58 Viton Intake Valve Stem Seals - Set of 12 $50.91
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IN STOCK Supertech VS-SU5.5-EI-8Supertech Valve Stem Seals Supertech Subaru BRZ / Toyota FRS Viton Valve Stem Seal - Set of 8 $33.33
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IN STOCK GSC Power Division 1039GSC Power Division Valve Stem Seal Sets GSC P-D Honda B/K/H Viton 6mm Exhaust Valve Stem Seal Set $34.91
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IN STOCK Supertech VS-M6.6I-8Supertech Valve Stem Seals Supertech Mitsubishi 6.6mm Intake Valve Stem Seal Viton (STD Size) - Set of 8 $30.89
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IN STOCK Supertech VS-TS6I-12Supertech Valve Stem Seals Supertech Subaru EJ25/Toyota 3SGTE/4AGE 16V / 7MGTE 6mm Polyacrylic Int Valve Stem Seal - Set of 12 $33.65
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IN STOCK Supertech VS-TS6E-8Supertech Valve Stem Seals Supertech Subaru EJ25 / Toyota 3SGTE/4AGE/7MGTE 6mm Viton Exhaust Valve Stem Seal - Set of 8 $32.81
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For more information on COMP Cams part number 521-16, you can visit the official COMP Cams website.