KYB 343131 Shock Absorber - Rear

KYB Excel-G Rear Shock for Camaro and Firebird

KYB Excel-G part number 343131 is a rear suspension shock absorber built to restore original ride control on classic Chevrolet Camaro and Pontiac Firebird applications. It uses a nitrogen gas-charged, twin-tube design with OE-quality components to bring back stable handling, braking response, and lane-change control.

The Excel-G line is KYB’s OEA replacement series, made on the same assembly lines used for original equipment production and calibrated to return the vehicle to its designed performance. For 1970-1981 Chevrolet Camaro and 1970-1981 Pontiac Firebird rear suspension service, 343131 is a direct-fit OE-style choice for restoration-focused repairs.

Key Features

• KYB recommended OE replacement shock for classic domestic cars
• 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
• Supports proper operation of electronic safety systems by maintaining suspension performance as engineered
• Strong, thick strut body and bracket construction helps minimize flex and maintain alignment
• Dust cover included

Product Details

KYB Excel-G 343131 is a rear shock absorber with a compressed length of 12.01 inches, extended length of 20.28 inches, and stroke length of 8.27 inches. It uses lower mount type S1 and upper mount type E3 (61.6 x 87 x 0). This part cross-references Monroe Shocks & Struts 5831 for the same application. Compatible With 1970-1981 Chevrolet Camaro, rear, and 1970-1981 Pontiac Firebird, rear.

What It Helps Address

• Excessive rear-end bounce after bumps
• Loose or unstable handling in cornering and lane changes
• Reduced braking stability caused by worn rear shocks
• Uneven tire contact from weak damping control
• Oil or gas leakage from aging suspension components

Installation Notes and Tips

• Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions.
• Verify rear mounting points and hardware condition before installation.
• Confirm the upper and lower mount types match the vehicle before ordering.
• After installation, inspect ride height, alignment, and road-test for proper damping response.

Quality Assurance

KYB is a major OE supplier, and the Excel-G line is produced on KYB OE assembly lines using OE-quality components. That manufacturing approach supports consistent damping performance for classic Chevrolet Camaro and Pontiac Firebird rear suspension service. Part number 343131 is built as an OEA-style aftermarket replacement for restoring original vehicle behavior.