JE Piston KTM 390

Gray Area KTM Verified independent store

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The in house custom racing piston for our 390's! We have them made fully boxed for durability at high RPM, coated for longevity, and single ring for maximum HP! This piston was des igned to eliminate the weak pin boss of the stock piston but maintain the stock compression ratio for the perfect match to the high compression gasket set!Now featuring ceramic coated tops for maximum detonation resistance! Show more