Wiseco Pistons K0009B125 Pistons - Professional Series

The Wiseco K0009B125 is a Professional Series forged piston set built for serious racing and high-performance engine builds. Constructed from 2618 alloy — the preferred material for forced induction and nitrous applications — these gas-ported pistons are engineered to survive extreme cylinder pressures while maximizing ring seal and power output. The set fits a 9.750" deck height and includes wrist pins (S462). Rings are sold separately; the recommended ring set is W77008-4625-5.

Key Features:

• 2618 Alloy Forging: High-strength aerospace-grade aluminum alloy provides superior fatigue resistance and thermal stability under extreme heat and pressure conditions.
• Gas Porting: Strategically placed gas ports allow combustion pressure to act directly behind the top ring, dramatically improving ring seal and reducing blow-by at high RPM.
• Quick 16 / Pro Series Design: Engineered to the exacting standards of Wiseco's Professional Series line, balancing lightweight construction with race-proven durability.
• Strutted Skirt Construction: Internal strut design controls thermal expansion for a tighter, more consistent bore fit across a wide temperature range.
• ArmorGlide Skirt Coating: Wiseco's proprietary dry-film lubricant reduces piston-to-wall friction, allows for tighter bore clearances, improves ring seal, and minimizes piston rock noise.
• Optimized Valve Pockets: Deep, precisely machined valve reliefs accommodate oversized valves and high-lift camshafts without sacrificing compression volume.
• Crown and Dome Geometry: Piston crown shapes are engineered to maximize intake charge scavenging and promote optimal quench during the compression/combustion cycle, resisting detonation and pre-ignition.
• Precision Ring Grooves: CNC-machined ring grooves feature calculated groove root diameters and axial widths for superior ring seal, minimal blow-by, and reduced oil consumption.
• ISO-Certified Forging Facility: Manufactured in Wiseco's in-house forging facility using advanced materials and feature-aligned grain flow technology.
• Includes Wrist Pins: S462 wrist pins included in the set. Rings sold separately — recommended ring set: W77008-4625-5.

Wiseco draws on decades of experience from Formula 1, IRL, NHRA Pro Stock, MotoGP, and AMA Superbike competition to develop pistons that deliver measurable power gains and long-term reliability. The K0009B125 Professional Series set is an ideal foundation for any high-output V8 racing or performance street engine build.