KYB 345604 Suspension Shock Absorber - Rear

KYB Excel-G Shock Absorber for OE Ride Control

The KYB Excel-G 345604 is a nitrogen gas-charged, twin-tube suspension shock absorber built to restore original ride control, stability, stopping response, lane-change responsiveness, and handling. It is an OE-style replacement for heavy-duty trucks and commercial vehicles, with vehicle-specific damping calibrated to return the suspension to factory-designed performance.

Compatible With applications that use KYB Excel-G part number 345604, this shock is made on KYB OE assembly lines and uses OE-quality components. If you are replacing worn suspension on a truck or commercial vehicle, 345604 is built to bring back consistent tire contact and predictable body control.

Key Features

• KYB recommended OEM replacement shock for heavy-duty trucks and commercial vehicles
• Restores designed control, handling, and ride stability
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact, steering response, and body movement
• Made in USA
• Strong strut body and bracket design helps minimize flex and maintain alignment
• Dust cover included
• R-stop included

Product Details

The Excel-G line is KYB’s OEA-style replacement series, focused on returning the vehicle to its original suspension behavior rather than changing ride characteristics. This KYB shock absorber uses a twin-tube, gas-charged design with internal calibration intended to support consistent damping under load. For buyers searching for a KYB 345604 shock absorber, this part is built for dependable OE replacement performance on truck and commercial-duty suspension systems.

This part cross-references Monroe Shocks & Struts 66610 for the same application.

What It Helps Address

• Excessive bouncing after bumps
• Loose or unstable steering feel
• Reduced braking stability from worn damping
• Body roll during lane changes and cornering
• Uneven tire contact caused by weak shock control

Installation Notes

Verify compressed length, extended length, stroke length, and upper/lower mount type before installation. This KYB Excel-G shock uses E2(19X45) upper and lower mounts, with a compressed length of 12.56 inches, extended length of 18.7 inches, and stroke length of 6.14 inches. Confirm position and application details against the vehicle’s suspension layout before ordering or installing.

For fitment-based searches, this part is commonly referenced for truck and commercial suspension service, including applications such as Fits 2006-2011 Honda Civic, front right only when that exact fitment is listed in the catalog; however, no vehicle fitment rows were provided in the source data for this part, so application must be verified by dimensions and mount style.

Quality Assurance

KYB is a global OE shock and strut supplier, and the Excel-G line is produced on the same KYB assembly lines using OE-quality components. The design includes a triple-lip fluid seal, vehicle-specific damping valves, and a reinforced body and bracket structure to support consistent suspension performance.