Wiseco Pistons PTS523A903 Pro-Tru LS Series Domed Piston Set 3.903" Bore +4cc

The Wiseco Pro-Tru LS Series piston set delivers professional-grade performance for small block Chevy LS engine builds. Engineered with a 3.903" bore diameter and +4cc dome design, these pistons are precision-machined to exacting tolerances for optimal compression and combustion efficiency.

Key Features:

• 3.903" bore diameter for LS1 and compatible LS series engines
• +4cc domed top design increases compression ratio for improved performance
• 1.335" OEM-style wrist pin for reliable piston-to-rod connection
• Pro-Tru series construction with advanced forging technology
• Precision-machined ring grooves for superior seal and reduced blow-by
• Includes complete piston set with pins and locks

Wiseco Pro-Tru pistons are manufactured from high-quality aluminum alloy forgings and feature advanced coating technology to reduce friction and extend service life. The domed design is ideal for naturally aspirated builds seeking increased compression ratios while maintaining proper quench clearance. Each piston undergoes rigorous quality control to ensure proper weight matching and dimensional accuracy across the set.