Wiseco K395X185 Professional Series Forged Piston Set 2618 Alloy Stroker/Nitrous/Turbo

The Wiseco K395X185 Professional Series forged piston set delivers race-proven performance for high-stress applications including stroker, nitrous, and turbocharged builds. Forged from 2618 aluminum alloy — the material of choice for extreme heat and pressure environments — these pistons are engineered to survive the punishment that destroys cast alternatives. Each set includes 8 pistons, rings (recommended ring set: 4188GFM), and wrist pins (S643). Designed for use with a 4.250" stroke and compatible with 9.700"/9.715" deck heights. Must be used with a K1 connecting rod.

Key Features:

• 2618 Alloy Forging: High-strength aluminum alloy ideal for forced induction, nitrous, and high-RPM stroker applications where superior fatigue resistance is critical
• Optimized Valve Pockets: Precision-machined valve reliefs allow maximum airflow around the valves while accommodating oversized valves and high-lift camshafts
• Performance Crown Design: Piston crown geometry promotes maximum intake charge efficiency through improved scavenging and cross-flow during valve overlap events
• Detonation-Resistant Dome Profile: Engineered for optimal quench during the compression and combustion cycle, reducing susceptibility to detonation and pre-ignition for longer engine life
• Precision Ring Grooves: Machined to exacting tolerances with calculated groove root diameters and axial widths, delivering excellent ring seal, minimized blow-by, and reduced oil consumption
• Complex Skirt Profiles: Contoured skirt geometry reduces friction losses while maintaining bore stability for consistent ring seal throughout the power stroke
• ArmorGlide Skirt Coating: Wiseco's proprietary dry-film lubricant reduces friction, permits tighter piston-to-wall clearances, minimizes piston rock noise, and improves long-term wear resistance
• ISO-Certified Forging Facility: Manufactured using advanced grain-flow aligned forging technology, ensuring consistent material integrity in every piston

Backed by Wiseco's racing heritage across Formula 1, Indy Racing League (IRL), NHRA Pro Stock, MotoGP, AMA Superbike, and AMA Supercross/Motocross, the K395X185 Professional Series piston set represents the pinnacle of American-made forged piston technology for serious performance engine builds.

Includes: 8 Pistons, Rings (Ring Set 4188GFM), Wrist Pins (S643) | Required Rod: K1 Connecting Rod | Stroke: 4.250" | Deck Height: 9.700" / 9.715"