Seller notes

Why professionals insist using only Hi-Per Blue® pistons:Hi-Per Blue® pistons are reengineered original equipment design, manufactured with upgraded high performance blue AEM (ethylene acrylic elastomer) for superior thermal and chemical resistance, offering better fit and performance. Other pistons are often made of a less-tolerant alkyl acrylate copolymer (ACM). Why AEM is a better choiceAEM is an ASTM designation for Ethylene Acrylic Elastomer, a very high performance material used in appli...

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