Manley 42547-1 Engine Piston Wrist Pin 23mm x 2.500 In. Straight Wall

The Manley 42547-1 is a precision-machined engine piston wrist pin designed for high-performance and racing applications. Measuring 23.00 mm (0.9055 in.) in diameter and 2.500 in. in length, this wrist pin features a straight wall design with a 0.250 in. wall thickness and weighs just 165 grams. It is manufactured from 9310 alloy steel, a case-hardening grade known for its excellent toughness and fatigue strength — a popular choice for performance engine builds where durability under high load is critical.

Key Features:

• Diameter: 23.00 mm (0.9055 in.)
• Length: 2.500 in.
• Wall thickness: 0.250 in., straight wall construction
• Weight: 165 grams
• Material: 9310 alloy steel for superior strength and wear resistance
• Retainer type: Tru Arc / Subaru Round Wire Lock
• Sold individually (quantity: 1)

Manley Performance has built a reputation for manufacturing precision engine components trusted by professional engine builders and motorsport competitors alike. This wrist pin is a direct-fit solution compatible with the specified Tru Arc or Subaru Round Wire Lock retainer style, making it a reliable choice for engine rebuilds and performance upgrades requiring a 23 mm straight-wall pin.