Driveshaft Shop 510223 Level 5 Front Axle Shaft for 2005-2007 Subaru WRX STI 2.5

Vehicle Fitment

• 2005-2007 Subaru Impreza WRX STI (GD Chassis Sedan; 2.5L Turbo H4; AWD)

Fitment Notes

• Single front axle only -- order two if replacing both sides.
• Designed exclusively for GD-chassis 2005-2007 WRX STI; does not fit 2004 STI or WRX non-STI models.
• Direct fit to OEM hubs and transmission output splines; no modifications required.
• Rated for high-horsepower applications up to 750 HP (front axle load).
• ABS ring and tone wheel retain factory functionality.
• Fitment confirmed through 2024; 2025 unconfirmed.

Features

• Level 5 high-strength single front axle engineered for extreme performance builds
• Aerospace-grade chromoly steel axle bar resists torsional twist and fatigue
• Billet CNC-machined inner CV joint for superior torque handling
• OEM-fit outer CV joint mates to stock wheel hub spline for easy installation
• Dynamically balanced to high RPM standards for vibration-free operation
• High-temp moly grease and heavy-duty boots for extended durability
• Direct-fit replacement using stock hardware and mounting geometry
• Hand-assembled and precision-tested in the USA by The Driveshaft Shop

Specifications

• Part Number: 510223
• Type: Single Front Axle (Left or Right Side)
• Level: 5 (750 HP Rating)
• Material: Aerospace-grade chromoly steel shaft / billet steel CV joints
• Position: Front Axle -- Left or Right
• Drivetrain: AWD (GD Subaru platform)
• Horsepower Capacity: Up to 750 HP (front axle limit)
• Warranty: 12-month limited manufacturer warranty

Included Components

• 1x Level 5 Front Axle Assembly (single side only)
• 1x Set of high-strength boots and CV grease (pre-installed)
• 1x Torque specification sheet and installation guide

Product Description

The Driveshaft Shop 510223 Level 5 Front Axle is a single-side, direct-fit upgrade for the 2005-2007 Subaru WRX STI (GD chassis). Built for high-horsepower street or track applications, this axle is rated to withstand up to 750 HP and eliminates the common failure points found in factory units.

Constructed from aerospace-grade chromoly steel with billet inner CV joints, the 510223 maintains OEM geometry while vastly improving torque capacity and durability. It is dynamically balanced for smooth operation at high RPM and installs using the factory spline and hardware. This listing is for a single front axle; order two if replacing both sides.