Wiseco K0131A6 Pro Tru Street Chevy Big Block Forged Piston Kit 4.310 in. Bore

The Wiseco K0131A6 is a Pro Tru Street series forged piston kit designed for Chevrolet Big Block engines with a 4.310 in. bore. Engineered and machined in Mentor, Ohio, this kit delivers the strength and precision fitment that serious street and performance builders demand. With a -9cc dish and a 1.520 in. compression height, the K0131A6 supports compression ratios ranging from 8.2:1 to 9.0:1 depending on displacement configuration, making it a versatile choice for high-output street, drag, and marine builds.

Key Features:

• Forged 4032 aluminum alloy construction for superior strength-to-weight ratio and thermal stability
• 4.310 in. bore with strutted skirt design for optimized rigidity and reduced weight
• 1.520 in. compression height | 4.250 in. stroke | 6.135 in. rod length
• -9cc dish yields 8.2:1–9.0:1 compression ratios across 107cc–123cc chamber volumes
• ArmorGlide® skirt coating reduces operating friction, resists seizure, and quiets piston noise
• Includes rings, wrist pin (S462, .990 x 2.930 in.), and circlips for a complete, all-in-one rebuild
• Compatible ringset: J820F8-4310-5 (sold separately for additional sets)
• Engineered, forged, and machined in the USA

The Wiseco Pro Tru Street series strikes the ideal balance between street reliability and performance capability. Whether refreshing a tired big block or building a new combination, the K0131A6 provides the precision tolerances and durable construction needed for long-term confidence under demanding conditions.