KYB 339089 Suspension Strut - Front

KYB Excel-G Front Strut for Pontiac Grand Prix

The KYB Excel-G 339089 is a front suspension strut built to restore original ride control, stability, and steering response on the Pontiac Grand Prix. It is an OE-style replacement for drivers who want factory-like handling characteristics rather than a changed ride feel.

Fits 2004-2008 Pontiac Grand Prix, front, recommended OEM replacement except Special Handling Package.

Key Features

• KYB recommended OEM replacement strut for the front suspension
• Restores designed control and handling on the Pontiac Grand Prix
• Nitrogen gas-charged, twin-tube construction
• 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
• Upper mount type: 14x1.50
• Compressed length: 10.64 in; extended length: 16.74 in; stroke length: 6.10 in

Detailed Description

KYB Excel-G is part of KYB’s Excel-G line, an OE-focused product range made on the same KYB assembly lines used for original equipment production. The 339089 front strut is calibrated to return the vehicle to its original designed performance, with damping characteristics that support predictable braking, lane-change response, and overall chassis control. For Pontiac Grand Prix owners, this front strut is a direct-fit service part for restoring suspension performance without altering the vehicle’s intended ride behavior.

This part cross-references Monroe Shocks & Struts 72177 for the same application.

What It Helps Address

• Excessive front-end bounce or float
• Reduced steering precision during lane changes
• Uneven tire contact caused by worn damping control
• Noise or vibration from a fatigued front strut
• Loss of stability under braking or cornering

Installation Notes and Tips

For best results, replace worn strut mounts when servicing the front suspension; KYB recommends mount part number SM5568 to reduce noise and vibration. A KYB strut boot, part number SB127, helps protect the new strut from dirt, debris, and road salt. Verify vehicle application carefully, as this front strut is not for Grand Prix models with the Special Handling Package.

Quality Assurance

KYB is a major OE supplier, and Excel-G is classified as an Original Equipment for the Aftermarket replacement line. The 339089 is built with OE-quality components and factory-style damping calibration to support consistent suspension performance on the 2004-2008 Pontiac Grand Prix.