Wiseco Chevy LS Series -3.2cc FT 3.903inch Bore Piston Shelf Stock Kit

SKU: K398X3903 / UPC: 00193564072382

Wiseco Professional Chevy LS Piston Set LS Engines

The Wiseco Professional Chevy LS Piston Set. Engineered for serious racers and builders, this premium piston kit is the top choice for those who demand the best in durability, precision, and power. Designed and manufactured in the USA, Wiseco’s Professional Series pistons are crafted from high-strength 2618 aluminum, delivering superior tensile strength and reliability under the most extreme conditions. Whether you’re building a high-boost, nitrous-fed race engine or a street-driven performance machine, this piston set is your go-to solution for unmatched performance and longevity.

Why Choose Wiseco?

• Performance: Wiseco’s Professional Series pistons are designed with cutting-edge technology, including precision-machined ring grooves, anti-detonation grooves, and forced pin oiling, ensuring optimal ring seal and durability in high-horsepower applications.
• ArmorGlide® Skirt Coating: This proprietary coating reduces friction, minimizes wear, and provides seizure resistance, resulting in quieter operation and extended piston life, even under severe duty conditions.
• Race-Proven Engineering: With over 80 years of racing heritage, Wiseco’s pistons are trusted by professionals in Formula 1, Indy Racing League, NHRA Pro Stock, and more, making them the gold standard for high-performance builds.
• Perfect Fit for LS Engines: Specifically designed for Chevy LS-Series engines, these pistons accommodate reluctor rings on stroker cranks without notching pin bosses, offering seamless integration and enhanced durability.
• Value: This set delivers premium features and performance that outshine competitors, making it the best investment for your LS build.

What’s Included?

• Set of 8 Pistons: Forged from 2618 aluminum for maximum strength and durability.
• Premium Ring Set: Includes top compression rings (0.047 in. thickness), second compression rings (0.047 in. thickness), and oil rings (3.0 mm thickness) for superior sealing and performance.
• Wrist Pins: High-quality 5115 material, floating style, with a 0.927 in. outer diameter for reliable operation.
• Piston Specifications:
• Bore Diameter: 3.903 in.
• Compression Height: 1.304 in.
• Piston Volume: -3.2cc flat-top design with two valve reliefs.
• Stroke: 3.622 in.
• Rod Length: 6.125 in.
• Piston Material: 2618 aluminum alloy.
• Forging Type: Strutted for enhanced structural integrity.
• Skirt Coating: ArmorGlide® for reduced friction and wear.
• GTIN/UPC: 00193564072382.

Vehicle Fitment

The Wiseco K398X3903 Piston Set is compatible with a wide range of Chevrolet small block Gen III/IV (LS-based) engines. Below is a detailed fitment list for specific year, make, model, trim, and engine configurations:

Note: Always confirm vehicle compatibility with your specific engine configuration before purchasing.

Why Wiseco is the #1 Choice

Unlike other piston sets, the Wiseco K398X3903 combines race-ready features with street-friendly durability. Its flat-top design with -3.2cc valve reliefs optimizes compression ratios for LS engines, while the ArmorGlide® coating ensures smooth, quiet operation. Competitors may offer similar bore sizes, but none match Wiseco’s precision engineering, premium materials, and proven track record in high-stakes racing environments. This piston set is built to handle the rigors of high-boost, nitrous, or naturally aspirated builds, making it the ultimate choice for enthusiasts and professionals alike.