Wiseco K586M90 Forged Piston Set for 91-98 Nissan 240SX KA24DE 90.50mm Bore

Vehicle Fitment

• Nissan KA24DE engine -- all applications
• 1991-1998 Nissan 240SX (S13/S14, KA24DE)
• 1993-1997 Nissan Altima (KA24DE)
• 1991-1992 Nissan Stanza (KA24DE)
• 1995-2004 Nissan Frontier (KA24DE)
• 1996-2000 Nissan Pathfinder (KA24DE)
• 1995-1997 Nissan Pickup / Hardbody (KA24DE)
• All KA24DE engine swap applications
• Verify engine code and bore size before ordering

Fitment Notes

• KA24DE engines only -- does NOT fit KA24E (single cam)
• 90.50mm bore -- block must be machined to match; stock KA24DE bore is 89.00mm (+1.50mm overbore)
• Compression height 33.94mm -- verify rod length compatibility before ordering
• Full Round forging -- standard skirt profile
• Professional engine builder installation required
• Measure all clearances before final assembly

Features

• Professional Series -- heavy to severe duty race builds
• 2618 aluminum -- improved tensile strength for boosted applications
• ArmorGlide® skirt coating -- seizure resistance and friction reduction
• Full Round forging
• Precision ring grooves with anti-detonation groove
• Forced pin oiling
• Fully machined crown
• Premium ring set included
• Wrist pin included
• Engineered, forged, and machined in the USA

Specifications

• Part Number: K586M90
• Series: Professional
• Engine: Nissan KA24DE
• Bore Diameter: 90.50mm
• Compression Height: 33.94mm
• Piston Volume: -22.00 CC (dish)
• Piston Material: 2618 aluminum
• Forging Type: Full Round
• Skirt Coating: ArmorGlide®
• Wrist Pin Style: Floating
• Wrist Pin OD: 0.827 in. (21mm)
• Top Compression Ring: 1.0mm
• Second Compression Ring: 1.2mm
• Oil Ring: 2.8mm
• Quantity: Set of 4
• GTIN: 00193564076120

Included Components

• 4x Wiseco Professional Series forged pistons
• 1x Premium ring set
• 4x Floating wrist pins

Product Description

The Wiseco K586M90 is a Professional Series forged piston set for the Nissan KA24DE engine at 90.50mm bore (+1.50mm overbore over stock). Used in the 240SX, Altima, Frontier, and Pathfinder among others, the KA24DE is a popular platform for naturally aspirated and turbocharged builds. Forged from 2618 aluminum with a 33.94mm compression height, these pistons are built for heavy to severe duty race applications. ArmorGlide® skirt coating reduces friction and resists seizure, forced pin oiling ensures lubrication under demanding conditions, and precision ring grooves with anti-detonation groove maximize ring seal.

Block must be bored and honed to 90.50mm before installation. KA24DE only -- does not fit the single-cam KA24E. Includes premium ring set and floating wrist pins. Engineered, forged, and machined in the USA. Professional engine builder installation required.