Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 520 seal has a .575" OD and fits applications with 5/16" valves and .530" OD guides.
All sales are final on custom order products.
PSI Proformance Inc. offers a Limited Lifetime Warranty on workmanship to the original purchaser. This warranty covers defects in materials and craftsmanship under normal use.
Refunds: Not available on custom orders.
Exchanges: May be permitted only with written approval from PSI Proformance Inc.
Customer Responsibility: The customer is responsible for all associated labor and shipping costs for exchanges or warranty claims.