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The KB Performance Piston Kit, part number KB425C.020, is engineered for high-performance 88-inch Twin Cam engines. Crafted from high-strength T-5 heat-treated 390 hypereutectic aluminum alloy, these pistons deliver exceptional durability and thermal management. The precision diamond-machined surface ensures a tight fit with a weight tolerance of less than one gram, promoting balanced operation and extending piston and ring life. This kit includes two pistons, piston pins, spiral-lock pin clips, and Hastings moly rings, offering a comprehensive package for engine rebuilds or upgrades. Replacement piston rings are sold separately, allowing customization based on specific performance needs. KB pistons are designed for a tighter installation compared to standard options, reducing piston rock and improving ring seal, which enhances overall engine performance and efficiency. Proper installation, including correct piston clearance and ring end gap, is critical for optimal operation and longevity, especially considering the pistons' superior thermal conductivity and design. It is recommended to carefully follow the included instructions for installing the pistons and rings to ensure reliable performance and avoid potential issues. Whether for street or racing applications, this piston kit provides the strength, precision, and reliability needed for demanding engine builds.
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