Wiseco K636M87 Forged 87 mm Pistons for 2008-2015 Evo X 4B11T

Vehicle Fitment

• 2008-2015 Mitsubishi Lancer Evolution X (4B11T, 2.0 L DOHC Turbo)

Features

• Forged from 2618 aerospace-grade aluminum for maximum strength
• ArmorGlide® skirt coating reduces friction and wear
• Strutted forging for enhanced stiffness at high RPM
• Dish volume optimized for lower compression tuning
• Designed for forced induction and high-performance applications
• Pre-gapped premium ring pack for reliable sealing
• Floating wrist pins improve durability under load
• Built for severe-duty and race-level engine builds

Specifications

• Bore diameter: 87.00 mm
• Compression height: 33.25 mm
• Dish volume: -4.5 cc
• Compression ratio: ~9.4:1
• Wrist pin diameter: 23 mm
• Piston material: 2618 forged aluminum alloy
• Recommended ring set: pre-gapped performance rings
• Piston weight: ~372 g per piston

Included Components

• 4x forged pistons
• 4x wrist pins
• 1x pre-gapped premium ring set
• 4x retaining clips / locks

Product Description

The Wiseco K636M87 piston set is designed for the Mitsubishi Lancer Evolution X 4B11T engine, delivering strength, reliability, and precision for performance builds. The 87 mm bore with 33.25 mm compression height and -4.5 cc dish volume provides slightly lower compression for turbocharged or high-boost setups.

Made from 2618 aerospace-grade aluminum, these pistons feature ArmorGlide® coated skirts for reduced friction and wear. Strutted forging enhances rigidity under high RPM, while floating wrist pins and a pre-gapped ring pack ensure durability and reliable sealing in demanding applications.

Ideal for factory-replacement, upgraded, or high-performance engine builds. Proper block machining and ring gap setup during installation are recommended to maximize performance and longevity.