Wiseco PTS518A3 Pro Tru Street Forged Piston Kit Chevy 502 BBC 4.500" Bore 3.8cc Dome

The Wiseco PTS518A3 is a complete Pro Tru Street forged piston kit for the Chevrolet 502 Big Block engine, featuring an 8-piece set engineered for reliable high-performance street and marine applications. Built from forged 4032 aluminum alloy, these pistons deliver the strength and durability needed for demanding engine builds at a competitive price point.

Key Features:

• Forged 4032 Aluminum construction for superior strength-to-weight ratio
• 3.8cc Mini Dome crown with as-forged dome design and integrated oil drain backs
• 4.500" bore with 1.645" compression height and 4.000" stroke compatibility
• 6.135" rod length specification for precise fitment
• 0.990" chromium alloy steel piston pins and Spirolox retainers included
• ArmorGlide skirt coating for seizure resistance, friction reduction, and quieter operation
• Oversized, symmetrical, radiused valve pockets to maximize flow during overlap and accommodate oversized valves and high-lift cams
• Ring package included: 1/16" moly top ring, 1/16" phosphate-coated cast iron second ring, and 3/16" oil ring (standard tension)
• Companion ring set part number: S100S8-4500-5
• Replacement piston part number: 5518A3
• 8.9:1 compression ratio based on 119cc cylinder head volume

Wiseco pistons are engineered, forged, and machined in Mentor, Ohio using state-of-the-art manufacturing equipment. The Pro Tru Street series delivers race-proven forged piston technology in a package designed for high-performance street and marine builds.