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. | |||||
$28.66
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IN STOCK Supertech VS-H5.5E-8Supertech Valve Stem Seals Supertech Honda 5.5mm Viton Exhaust Valve Stem Seal - Set of 8 $33.33
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IN STOCK Supertech VS-N6E-12Supertech Valve Stem Seals Supertech Nissan 6mm Viton Exhaust Valve Stem Seal - Set of 12 $36.62
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IN STOCK Supertech VS-VBM6I-8Supertech Valve Stem Seals Supertech VW/Audi / BMW 6mm Polyacrylic Intake Valve Stem Seal - Set of 8 $30.89
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IN STOCK Supertech VS-T6SM-8Supertech Valve Stem Seals Supertech 6mm Valve Stem Seal OD 12.2mm Viton - Set of 8 $33.33
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IN STOCK Supertech VS-N6I-8Supertech Valve Stem Seals Supertech SR20DE/SR20DET/RB26 6mm Intake Valve Stem Seal - Set of 8 $30.89
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IN STOCK Supertech VS-N5.5E-8Supertech Valve Stem Seals Supertech Nissan 5.5mm Valve Stem Seal - Set of 8 $33.83
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IN STOCK - LOW Manley Performance 24043-8Manley Performance Valve Stem Oil Seals Manley Valve Stem Oil Seal, SEALS11/32 STEM $41.98
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For more information on COMP Cams part number 521-12, you can visit the official COMP Cams website.