KYB 345620 Suspension Shock Absorber - Front

KYB Excel-G Shock Absorber 345620

KYB Excel-G 345620 is a nitrogen gas-charged, twin-tube suspension shock absorber built to restore original ride control, stability, stopping response, lane-change behavior, and handling. It is made on KYB OE assembly lines with OE-quality components for heavy duty truck and commercial vehicle service.

The Excel-G line is KYB’s OEA-style replacement series, calibrated to return the vehicle to its designed damping characteristics rather than alter them. For drivers and technicians servicing heavy duty truck and commercial vehicle suspension systems, KYB 345620 is a direct-fit OE replacement choice for maintaining predictable steering response and body control.

Key Features

• KYB recommended OEM replacement shock for heavy duty trucks and commercial vehicles
• Nitrogen gas-charged, twin-tube design for consistent damping performance
• 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
• Dust cover included
• Made in USA
• Cross-reference: Monroe Shocks & Struts 66923 for the same application

Product Details

KYB Excel-G 345620 is engineered for suspension service where restoring factory ride characteristics matters. Its compressed length is 14.44 inches, extended length is 24.51 inches, and stroke length is 10.07 inches. The upper and lower mount types are S1(1/2), making it a fitment-focused replacement for the specified application. This part number is commonly searched as KYB 345620 and KYB Excel-G 345620 for suspension repair on heavy duty truck and commercial vehicle platforms, including Chevrolet truck and GMC truck applications where this OE-style damping profile is required.

What It Helps Address

• Excessive bounce after bumps or dips
• Loose or delayed steering response
• Body roll during lane changes and cornering
• Reduced tire contact from worn damping control
• Suspension instability that can affect braking and electronic safety system performance

Installation Notes and Tips

Verify mount style, compressed length, extended length, and stroke length before installation. Inspect related suspension components, including bushings, mounts, and tires, so the new shock absorber can perform as designed. After replacement, confirm ride height, alignment condition, and road-test the vehicle to check for proper damping response. Fits 2006-2011 Chevrolet Silverado 2500 HD, rear; Fits 2006-2011 Chevrolet Silverado 3500 HD, rear; Fits 2006-2011 GMC Sierra 2500 HD, rear; Fits 2006-2011 GMC Sierra 3500 HD, rear.

Quality Assurance

KYB supplies shocks and struts to new vehicle manufacturers and builds the Excel-G line on the same OE assembly lines using OE-quality components. The design focus is restoring original suspension performance for dependable control, stability, and handling.