Wiseco PTS524A4 Pro-Tru Street BBC Flat Top Forged Piston Set 4.290 Bore 8.2L Marine

The Wiseco PTS524A4 is a Pro-Tru Street series forged piston set designed for Chevrolet Big Block (BBC) 8.1L/8.2L marine applications. Built on demand, this complete kit delivers the strength and precision of a forged piston at an accessible price point, making it an ideal choice for high-performance marine engine rebuilds.

Key Specifications:

• Bore: 4.290 in.
• Compression Height: 1.340 in.
• Piston Profile: Flat Top (-2.0cc)
• Wrist Pin Diameter: 0.990 in.
• Stroke: 4.370 in.
• Rod Length: 6.700 in.
• Material: Forged 4032 aluminum alloy
• Top Ring Type: Moly Faced Ductile Iron

• Ring set (moly faced ductile iron top ring)
• Chromium alloy steel piston pins
• Spirolox retaining clips

Key Features:

• ArmorGlide skirt coating for seizure resistance, friction reduction, and quieter operation
• AS-forged dome with crown features and oil drain backs
• Forged and CNC-machined in Mentor, Ohio to exacting tolerances
• Compatible with stock 6.693 in. rod length or designed to work with aftermarket 6.700 in. rod
• Built on demand — ensures fresh, precision-manufactured components

Wiseco's Pro-Tru Street series offers a complete, all-inclusive rebuild solution. Each piston is forged from 4032 alloy aluminum and matched with rings, pins, and clips so builders have everything needed for a dependable marine engine rebuild.