Wiseco PTS524AS Pro-Tru Street BBC Flat Top Piston Set 4.255 in. Bore 8.2L Marine

The Wiseco PTS524AS Pro-Tru Street Series piston set is a complete, forged 4032 alloy aluminum piston kit engineered for Chevrolet Big Block (BBC) 8.1L / 8.2L GEN VII engines, including marine applications. Each kit includes rings, pins, and clips for an all-inclusive engine rebuild.

Key Features:

• 4032 Forged Aluminum Construction — manufactured in Mentor, Ohio for superior strength and dimensional stability
• ArmorGlide® Skirt Coating — proprietary coating that is seizure resistant, reduces friction, and promotes quieter operation
• AS-Forged Dome with crown features and oil drain backs for optimal lubrication control
• Oversized, symmetrical, radiused valve pockets — maximize flow around the valves during overlap and accommodate oversized valves and high-lift camshafts
• Chromium Alloy Steel Piston Pin included for added durability
• Spirolox® Retaining Rings included — complete, ready-to-install kit
• Performance Ring Set (4260H) included

Specifications:

• Bore: 4.255 in.
• Compression Height: 1.350 in.
• Stroke: 4.370 in.
• Rod Length: 6.700 in.
• Pin Diameter: 0.990 in.
• Crown Volume: -2.00 cc (Flat Top)
• Cubic Inches: 497 cu. in.
• Compression Ratio (at 118cc head): 8.7:1 / 8.8:1
• Replacement Single Piston PN: 5524AS