KYB 345605 Suspension Shock Absorber - Rear

KYB Excel-G Shock Absorber for OE-Style Control

KYB Excel-G Part Number 345605 is a nitrogen gas-charged, twin-tube suspension shock absorber built to restore original ride control, stability, braking response, lane-change behavior, and handling. It is made on KYB OE assembly lines with OE-quality components and is a direct replacement choice for heavy-duty trucks and commercial vehicles.

The Excel-G line is KYB’s Original Equipment for the Aftermarket offering, focused on returning the vehicle to its designed damping characteristics rather than changing ride feel. For applications such as Chevrolet Silverado and GMC Sierra service work, 345605 is selected when the goal is factory-style control and consistent suspension response.

Key Features

• KYB recommended OEM replacement shock for heavy-duty trucks and commercial vehicles
• Restores designed control, handling, and body motion management
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact and steering response
• Made in USA
• Supports proper operation of electronic safety systems by maintaining suspension behavior as engineered
• Strong, thick strut-body construction helps minimize flex and maintain alignment under load
• Part number 345605

Detailed Description

KYB Excel-G 345605 is engineered for drivers and technicians who need a replacement shock absorber that returns the suspension to original performance targets. The twin-tube, gas-charged design uses OE-quality components and calibrated damping to control rebound and compression in a way that supports stable braking, predictable steering, and consistent tire contact. This makes it a practical choice for Chevrolet Silverado and GMC Sierra applications where factory ride control matters.

This part cross-references Monroe Shocks & Struts 66618 for the same application. If you are servicing a compatible Chevrolet Silverado or GMC Sierra platform, 345605 provides an OE-style replacement path that aligns with the vehicle’s original suspension tuning.

What It Helps Address

• Excessive bouncing after bumps or dips
• Loose or unstable handling during lane changes
• Reduced braking stability caused by worn damping
• Poor tire contact and uneven suspension response
• Suspension noise or leakage from a worn shock absorber

Installation Notes and Tips

Verify the mounting style, compressed length, and extended length before installation. This shock absorber uses upper and lower E1L/E(19) style mounts, with a compressed length of 13.39 inches and an extended length of 21.53 inches. Confirm the vehicle’s original configuration and inspect related suspension components, alignment settings, and mounting points before replacing the shock.

For Chevrolet Silverado and GMC Sierra service, compare the existing part to KYB 345605 and confirm the application details against the vehicle’s suspension layout. Proper installation and alignment checks help preserve the handling characteristics the shock is designed to restore.

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 restoration of original vehicle performance, and the part is manufactured in the USA.