This product is a 90mm forged flat-top piston designed as a replacement for Predator 420 (e.g., Hemi) and Honda GX390 series engines. As a critical internal engine component, its +.080 inch (approximately 2mm) oversize provides a solution for cylinder rebuilding where bore wear exists or for performance overbore modifications. Manufactured through a forging process, it offers greater material strength and fatigue resistance compared to cast pistons, better withstanding high RPM and temperature conditions for improved engine reliability and longevity. The flat-top design aids in maintaining compression ratio, making it compatible with a broad range of carburetor and ignition upgrades. Ideal for engine overhaul or performance builds in go-karts, racing applications, and small industrial machinery, it is a practical choice for both DIY enthusiasts and professional mechanics. Please verify that your specific engine model and final cylinder bore dimensions precisely match this piston's specifications prior to installation.
