Sold in specified sets of 8 or 16 to replace/install seals for all 8 exhaust valves, all 8 intake valves, or all 16 valves. Choose your configuration from the drop down selector. For all-out best performance, we'd recommend going with all Viton seals for both the intake and exhaust valves. The cost difference is negligible compared to the difference in characteristics between the two (read extended description below)
Supertech Viton Exhaust Valve Seals
Supertech Polyacrylic Intake Valve Seals
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