Wiseco PTS533A4 Pro Tru Street Pistons Chevy Small Block 4.040" Bore -20cc

The Wiseco PTS533A4 Pro Tru Street Pistons are a high-quality forged piston set engineered for Chevrolet Small Block engines, featuring a 4.040-inch bore and a -20.00cc dish volume. Designed as a performance upgrade over cast OEM pistons, the Pro Tru Street series delivers the strength of a forged piston at an accessible price point — making them ideal for street performance, street/strip builds, and 6.2L marine applications.

Wiseco's Pro Tru Street pistons are manufactured from 2618 alloy forged aluminum, providing excellent strength-to-weight ratio and superior thermal fatigue resistance compared to cast alternatives. Each piston features a 1.425-inch compression height and is designed for use with a 6.2-inch connecting rod (part family 5004A4). The -20.00cc dish helps achieve target compression ratios across a wide range of cylinder head combinations.

Key Features:

• 4.040" Bore Diameter — suits standard and lightly oversized Chevy Small Block applications
• -20.00cc Dish Volume — enables tunable compression ratios with various head combinations
• 1.425" Compression Height — compatible with 6.2" connecting rods
• 2618 Forged Aluminum Construction — superior strength and durability over cast pistons
• Pro Tru Street Series — built for street performance, street/strip, and marine duty cycles
• 6.2L Marine Application Compatible — built to stock marine displacement specifications
• Full-floating or press-fit wrist pin design for smooth operation and durability
• Manufactured in the USA by Wiseco, a trusted leader in performance pistons

Whether you're rebuilding a Chevy Small Block for daily driving, weekend racing, or a 6.2L marine engine, the Wiseco Pro Tru Street PTS533A4 delivers reliable forged-piston performance with the fitment precision Wiseco is known for.