Wiseco RED0021X05 RED Series Chevy Small Block 400 Forged Piston Set 4.130 in. Bore -21cc Dish

Featuring a 4.130 in. bore, 1.425 in. compression height, -21.00 cc dish, and 0.927 in. pin diameter, this set delivers the precision specifications performance builders need for reliable, competitive power.

Appropriately named for Race Engineered Design™, the RED Series combines heavy-duty forged construction with precision-machined features tailored specifically for popular domestic V8 platforms — from drag racing to circle track competition.

Key Features:

• Bore: 4.130 in.
• Compression Height: 1.425 in.
• Dish Volume: -21.00 cc
• Pin Diameter: 0.927 in.
• Engineered, forged, and machined in the USA from 2618 aluminum for tensile strength required in performance racing and power adder applications
• Dedicated engine-specific strutted forgings optimize the strength-to-weight ratio for each application
• ArmorGlide® skirt coating reduces operating friction and noise while minimizing skirt and cylinder wall wear
• Horizontal slot oiling in pin bores maintains optimal wrist pin and small-end lubrication for long service life
• Accumulator groove helps maintain a consistent ring seal and power output
• Includes premium rings — no additional sourcing required

The Wiseco RED Series piston set is engineered for builders seeking race-proven durability and precision in Chevrolet Small Block 400 applications, from mild performance builds to high-output, power-adder combinations.