Wiseco PTS585A5 Pro Tru Street Forged Piston Set 4.360 in. Bore Buick 455 / Cadillac 500

The Wiseco PTS585A5 is a Pro Tru™ Street series forged piston kit designed for Buick 455 and Cadillac 500 V8 engines. Forged from 4032 alloy aluminum at Wiseco's manufacturing facility in Mentor, Ohio, these pistons deliver a significant durability and performance advantage over standard cast pistons — at a price point suited for street builds.

This kit features a flat top design with -27cc dish volume, a 4.360 in. bore, 1.900 in. compression height, and a 1.000 in. wrist pin diameter. The -27cc reverse dome helps fine-tune compression ratios for mild to moderate performance builds. Each piston is coated with Wiseco's ArmorGlide® skirt coating for reduced friction, seizure resistance, and quieter operation.

Kit Specifications:

• Bore: 4.360 in.
• Compression Height: 1.900 in.
• Wrist Pin Diameter: 1.000 in.
• Dome/Dish Volume: -27cc (flat top with dish)
• Stroke: 4.304 in.
• Rod Length: 6.750 in.
• Material: 4032 forged aluminum alloy
• Skirt Coating: ArmorGlide®

• 8 forged aluminum pistons with ArmorGlide® skirt coating
• Chromium alloy steel piston pins
• Spirolox® piston rings
• Retaining clips

The Pro Tru™ Street series is engineered for mild-to-moderate street performance builds, balancing improved power output with everyday reliability. This all-inclusive kit includes everything needed for a complete piston replacement or engine rebuild.