KYB 339172 Suspension Strut - Front Left

KYB Excel-G Front Left Strut for Impreza

The KYB Excel-G 339172 is a front left suspension strut for 2008-2011 Subaru Impreza models. Built to restore original ride control and steering response, it is a direct OE-style replacement for drivers addressing worn suspension performance on the Subaru Impreza.

Key Features

• OE-style replacement for Asian vehicles, calibrated to restore factory handling characteristics
• Fits 2008-2011 Subaru Impreza, front left
• Nitrogen gas-charged twin-tube design for consistent damping response
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact, steering response, and body movement
• Strong strut body and bracket design helps minimize flex and maintain alignment
• Made in USA
• R-stop design included

Product Details

KYB Excel-G struts are built on OE manufacturing lines using OE-quality components and are calibrated to restore the vehicle’s original suspension behavior rather than change it. For Subaru Impreza owners, part number 339172 is a practical choice when the goal is to recover stable braking, lane-change response, and predictable handling after the original strut has worn out. This part cross-references Monroe Shocks & Struts 72566 for the same application.

Common Problems This Strut Can Address

• Excessive bounce or reduced damping control
• Loose or delayed steering response
• Nose dive during braking
• Uneven tire contact caused by worn suspension control
• Noise or fluid loss from a failing front strut

Installation Notes and Tips

Fits 2008-2011 Subaru Impreza, front left. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify upper mount thread size 12x1.25 and confirm compressed length 13.42 in., extended length 19.71 in., and stroke length 6.29 in. before installation. For added protection, KYB recommends strut boot SB103 to help shield the new strut from dirt, debris, and road salt.

Quality Assurance

KYB is a major OE supplier, and the Excel-G line is produced to match original equipment performance targets for ride control, stability, and handling. The design also supports proper operation of electronic safety systems by helping the suspension, brakes, and tires perform as engineered.