With the cost of copper rising, and recent tariffs, lifter bushings are SILENTLY being replaced with “cast bronzes” or softer grade materials. Employees at Precision Products Performance have been working to replenish inventory in our signature lifter bore sleeves using the same certified materials you’ve always used. Always request material certifications for traceability and material origins. As always, all of our bronze bushing materials are Ampco-45, LeBronze (origin France), Materion BeCu,