Manley 9310 Steel Wrist Pins (Straight Wall Chamfered) – EJ25 Piston Set of 4 (.905” × 2.500” × .210” / 23mm)

Overview
The Manley Extreme Duty Wrist Pin Set is an essential upgrade for Subaru WRX EJ205 and STI EJ257 engines running Manley Platinum Series pistons. Manufactured from premium 9310 steel alloy, these pins deliver maximum durability under extreme conditions. Precision-machined for exact sizing and concentricity, they provide consistent fit and reliability for high-performance and motorsport applications.

Key Features

• Designed as an upgrade for Manley Platinum Series EJ205 and EJ257 pistons
• 9310 alloy steel construction for extreme durability
• Straight wall design with large O.D. chamfer
• Requires round wire locks (Tru Arc/Subaru type)
• Inside surface fully finished, free of tooling marks
• Precision sizing and perfect concentricity

Wrist Pin Specifications

• Material: 9310 Alloy Steel
• Diameter: 23mm / 0.9055"
• Length: 2.500"
• Wall Thickness: 0.210"
• Wall Type: Straight
• Weight: 147g
• Lock Rings: Tru Arc / Subaru Round Wire

Chamfer Specifications

• Type: Manley & Gibtec Chamfer
• Degree: 45°
• Width: 0.035"
• All Diameters Supported

Vehicle Compatibility

• Subaru WRX EJ205 (with Manley Platinum Series Pistons)
• Subaru WRX STI EJ257 (with Manley Platinum Series Pistons)