Supertech 87mm Bore Piston Rings - 1x3.30 / 1.2x3.60 / 2.8x3.30mm High Performance Gas Nitrided

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.