Manley 596265C-8 Chevrolet LS Dish Top Forged Piston Set 4.065 Bore -18cc

Featuring a 4.065" bore, 4.000" stroke, and a -18cc dish top, these pistons are purpose-built for builders targeting lower compression ratios — ideal for forced induction, nitrous, or high-boost applications.

Part of Manley's renowned Platinum Series, these pistons are forged from domestic 2618 high-strength alloy, a material well-regarded for its superior impact resistance and durability under extreme heat and cylinder pressure. Manley's unique single-operation fixturing process machines the skirt and ring grooves simultaneously, ensuring maximum ring groove-to-skirt squareness for an optimal ring seal and consistent power output.

Key Specifications:

• Bore: 4.065"
• Stroke: 4.000"
• Rod Length: 6.125"
• Compression Height: 1.115"
• Dish Volume: -18cc
• Wrist Pin Diameter: .927"
• Ring Thickness: Top Ring – 1.5mm (.250" down); Second Ring – 1.5mm; Oil Ring – 3mm
• Valve Pocket Compatibility: LS1, LS2, LS3, LS6, L92
• Quantity: 8 pistons per set
• Material: 2618 forged aluminum alloy

Key Features:

• 2618 Alloy Forgings – Domestic high-strength forgings for superior durability in demanding performance applications
• Cam and Barrel Skirt Profile – Optimized skirt geometry generates strong cylinder wall contact while minimizing wear
• Single-Operation Fixturing – Ring groove machining and skirt turning completed in one pass for maximum squareness and ring seal
• Premium Chrome Moly Wrist Pins – Included with the set for reliable pin retention and reduced rotating mass
• Dish Top Design – The -18cc dish reduces effective compression ratio, making these pistons well-suited for boosted or power-adder builds

Wrist pins and rings are included. These pistons are a trusted choice among professional engine builders and high-performance tuners demanding reliability and precision in their LS builds.