Wiseco PTS518A6 Pro Tru Marine Chevy Big Block 502 Forged Piston Kit +3.8cc Dome 4.530 in. Bore

The Wiseco PTS518A6 is a Pro Tru Marine forged piston kit designed for the Chevrolet Big Block 502 engine.

Each piston is forged from 4032 alloy aluminum at Wiseco's manufacturing facility in Mentor, Ohio, ensuring precise tolerances and long-term strength under the demanding conditions of marine use. The +3.8cc dome design supports elevated compression ratios suited to high-performance marine builds.

Key Features:

• Application: Chevrolet Big Block 502 Marine engines
• Bore: 4.530 in. (actual)
• Compression Height: 1.645 in.
• Piston Pin Diameter: 0.990 in.
• Dome Volume: +3.8cc
• Stroke: 4.000 in.
• Rod Length: 6.135 in.
• Material: 4032 forged aluminum
• Piston Head Type: Dome
• ArmorGlide® Skirt Coating for seizure resistance, friction reduction, and quieter operation
• Ring Set Included: S100S8-4530-5
• Chromium alloy steel piston pin and Spirolox clips included
• AS-forged dome with crown features and oil drain backs
• Build on demand

Wiseco's Pro Tru Marine series pistons are engineered and machined on precision equipment to meet the performance demands of high-output marine powerplants. With an all-inclusive kit featuring rings, pins, and clips, the PTS518A6 provides everything needed for a complete marine engine rebuild.