Wiseco K634M87 2618 Forged Piston Set of 4 -87mm 12.5:1 Honda K24 w/K20 Head

Vehicle Fitment

• 2002-2006 Honda CR-V
• 2003-2007 Honda Accord
• 2003-2011 Honda Element
• 2002-2006 Acura RSX Type-S
• 2004-2008 Acura TSX

Fitment Notes

• Fits Honda K24 engine block
• 12.5:1 compression with K20 head; 12.8:1 with K24 head
• RSX Type-S application is a K24 block / K20 head hybrid build
• High-compression forged race piston -- not a stock OEM replacement
• Full engine build and machine work required
• Set of 4 -- services one 4-cylinder engine

Features

• Professional Series forged racing piston
• 2618 aluminum forging
• ArmorGlide skirt coating
• Fully machined crown
• Precision ring grooves
• Anti-detonation groove
• Forced pin oiling
• Strutted forging design
• Made in USA

Specifications

• Bore: 87.00mm (3.425")
• Compression Height: 30.00mm (1.181")
• Dome/Dish Volume: +5.00cc
• Compression Ratio: 12.5:1 (K20 head) / 12.8:1 (K24 head)
• Wrist Pin Diameter: 0.866" (22mm)
• Material: 2618 forged aluminum
• Skirt Coating: ArmorGlide
• Forging Type: Strutted
• Quantity: Set of 4
• UPC: 00193564077509

Included Components

• 4x Forged Pistons
• 4x Wrist Pins (0.866" / 22mm)
• 8x Wrist Pin Locks (2 per piston)
• 1x Ring Set (P/N 8700XX): 1.0mm top / 1.2mm second / 2.8mm oil

Product Description

The Wiseco K634M87 is a Professional Series forged piston set engineered for Honda K24 engine builds. With an 87.00mm (3.425") bore and a +5.00cc dish, the set delivers a 12.5:1 compression ratio when paired with a K20 cylinder head, or 12.8:1 with a K24 head. The 30.00mm (1.181") compression height suits the popular K24 block / K20 head configurations found in built Accord, CR-V, Element, TSX, and RSX Type-S applications.

Each piston is forged from 2618 aluminum for high tensile strength and finished with Wiseco's ArmorGlide skirt coating. The design features a fully machined crown, precision ring grooves, an anti-detonation groove, and forced pin oiling. All pistons are engineered, forged, and machined in the USA.

The set includes four forged pistons, a matched 8700XX ring set, wrist pins, and pin locks. Built to withstand heavy to severe-duty performance and race use, the K634M87 raises compression well above stock and requires a complete engine build for installation.