Wiseco K0031B4 Lil Quick 16 SBC 18-Degree Solid Dome Forged Piston Set 4.165 Bore

The Wiseco K0031B4 is part of the renowned "Lil Quick 16" series of forged racing pistons engineered specifically for Small Block Chevy (SBC) engines equipped with 18-degree cylinder heads. Featuring a solid +3cc dome design, a 4.165" bore, and a 1.125" compression height, this set is built to deliver high-compression race performance at 13.5:1. Gas porting is included for improved ring seal and combustion efficiency at high RPM. This set is built to order (Build to Stock).

Key Features:

• Series: "Lil Quick 16" — designed for 18-degree SBC cylinder heads
• Construction: Forged and machined in-house for superior strength-to-weight ratio
• Bore: 4.165"
• Compression Height: 1.125"
• Dome: Solid +3cc dome, 13.5:1 compression ratio
• Stroke: 3.750" | Rod Length: 6.000"
• Wrist Pin Diameter: .927"
• Advertised Weight: ~486 grams per piston
• Valve Pockets: Int. .290" / Exh. .260"
• Gas Ported: Yes — vertical gas ports for enhanced ring seal
• High-Strength Strutted Design for maximum rigidity under race loads

Wiseco's forged pistons feature condensed grain structure aligned to part geometry, delivering higher mechanical properties and exceptional resistance to impact and fatigue compared to cast alternatives. Forged and fully machined at Wiseco's U.S. facility, the K0031B4 is a proven choice for serious SBC race engine builds requiring precise combustion chamber geometry and dependable high-RPM durability.