Fits select 1995-2011 Subaru and Saab models including Impreza (WRX/STI), Forester (XT), Legacy (GT), and Outback (XT). These Manley wrist pin retainers are engineered to provide secure pin retention in high-performance applications where standard snap rings may fail. Manufactured from high-tensile round wire, these .054" locks are designed to fit precisely within the piston's lock groove, ensuring the wrist pin remains centered even under extreme RPM and cylinder pressures.

• Manufacturer Part Number: 42212-8
• Wire Diameter: .054"
• Material: High-strength round wire
• Quantity: Set of 8 locks
• Applications: Suitable for select Subaru EJ-series and Saab 2.5L engines

Ideal for engine rebuilds using Manley or compatible aftermarket pistons, these locks replace worn or damaged factory retainers to maintain rotating assembly integrity. Professional installation is recommended to ensure proper seating within the lock groove.

JE Pistons Tru-Arc locks offer an efficient and reusable solution for retaining piston pins in stock and low-to-moderate horsepower applications. Engineered from durable carbon steel, these locks provide a balance between ease of installation and secure retention, specifically designed to function with stock sharp-edge wrist pins that do not have the chamfers required for traditional wire locks.

Unlike spiro locks, which are typically deformed during removal and require replacement, Tru-Arc locks are designed for reusability and simplify the assembly process. They serve as a specialized alternative for builders seeking a reliable pin retention method without the complexity of installing double spiro or wire locks in specific piston pin boss configurations.

• Manufactured from high-grade carbon steel for consistent tension
• Designed for compatibility with stock sharp-edge wrist pins
• Reusable design provides added value during engine teardowns
• Simpler installation and removal compared to standard spiro locks
• Ideal for low-to-moderate power builds; not for high-horsepower applications
• Manufacturer Part Number: 905-042-CT

JE Pistons Wire Locks provide a high-strength solution for wrist pin retention in performance engines. Engineered to distribute side loads across a larger portion of the piston pin boss compared to standard spiro locks, these wire locks offer superior stability under high-stress conditions. They are specifically designed for use with chamfered wrist pins, ensuring a secure fit within the piston groove.

Constructed from premium Chrome Silicon, these locks provide the necessary tension and fatigue resistance required for racing and high-output applications. Their design minimizes the risk of rotation and ensures the wrist pin remains properly located during the entire combustion cycle.

• Manufacturer Part Number: 866-063-MW
• Material: Chrome Silicon
• Lock Type: Wire Lock
• Compatibility: Requires chamfered wrist pins
• Application: High-strength wrist pin retention for performance pistons

Fits select 1996-2019 Honda, Husqvarna, Kawasaki, KTM, Polaris, Suzuki, and Yamaha models.

This JE Pistons wire lock is engineered as a high-strength retention solution for wrist pins. Manufactured from durable chrome silicon, these wire locks are designed to spread side loads over a larger portion of the piston pin boss area compared to traditional lock styles. This makes them a preferred choice for high-stress performance applications where pin stability is critical.

Installation requires the use of chamfered wrist pins to ensure proper seating and security. Unlike spiro locks, which are installed by rotating into the groove, or tru-arc locks, which prioritize ease of installation, wire locks provide superior resistance to rotation and movement within the groove when paired with the correct hardware.

• Material: Chrome Silicon
• Pin Diameter: .787 inch
• Wire Thickness: 0.050 inch
• Installation Requirement: Chamfered wrist pins required
• Manufacturer Part Number: 787-050-MW

This CP Wire Lock is precision-engineered for high-performance engine assemblies, providing critical retention for the wrist pin within the piston. Designed to withstand the extreme centrifugal forces and thermal cycles of a combustion chamber, these locks ensure the piston pin remains centered and secure during operation.

• Bore Diameter: .905 in
• Thickness: .073 in
• Compatible Pin Size: 23mm
• Material: High-tensile spring steel
• Manufacturer Part Number: 905X073SWL

Properly installed wire locks are essential for preventing pin migration, which can cause significant damage to cylinder walls. This component is a direct replacement or specification-match for CP-Carrillo pistons requiring a .905 inch bore and .073 inch thickness retainer.

This CP-Carrillo Piston Pin Wire Lock is a precision-engineered retainer designed to securely hold the wrist pin in place within the piston boss. Engineered for the rigors of high-performance and racing engines, these locks provide the necessary tension to prevent lateral pin movement, protecting the cylinder walls and reciprocating assembly from damage.

• Manufacturer Part Number: 866X063SWL
• Part Type: Piston Pin Wire Lock
• Critical for high-RPM and high-load engine builds
• Precision-formed for consistent seating and retention
• Reliable replacement for worn or single-use factory locks

Ensure secure piston pin retention with this CP-Carrillo 21mm round wire lock (MPN: 827X063SWL). Designed for high-performance reciprocating assemblies, these locks provide the critical tension required to keep the wrist pin centered, preventing lateral movement that can lead to cylinder wall scoring or catastrophic engine failure.

Manufactured from high-strength spring steel, these wire locks are engineered to maintain their shape and seat pressure under the extreme stresses and high RPMs of performance engines. They are essential components for any engine build using 21mm wrist pins where reliable pin security is mandatory.

• Fits 21mm diameter piston wrist pins
• Precision-formed from high-tensile spring steel for maximum retention
• Ensures the wrist pin remains properly located within the piston boss
• Sold individually; verify required quantity for your engine application
• Manufacturer Part Number: 827X063SWL