Bilstein 20-070281 B6 Performance 46mm Rear Shock for 1992-1995 C4 Corvette FX3

Vehicle Fitment

• 1992-1995 Chevrolet Corvette Base Coupe (C4, RWD, 5.7L V8 LT1, with FX3 Selective Ride Control)
• 1992-1995 Chevrolet Corvette Convertible (C4, RWD, 5.7L V8 LT1, with FX3 Selective Ride Control)
• 1992-1995 Chevrolet Corvette ZR-1 (C4, RWD, 5.7L V8 LT5, FX3 Selective Ride Control - standard equipment)
• 1993 Chevrolet Corvette 40th Anniversary Edition (C4, RWD, 5.7L V8 LT1, with FX3 Selective Ride Control)
• 1995 Chevrolet Corvette Indianapolis 500 Pace Car (C4, RWD, 5.7L V8 LT1, with FX3 Selective Ride Control)

Fitment Notes

• Fits 1992-1995 C4 Corvettes equipped with the FX3 Selective Ride Control (electronic adjustable suspension) only - does NOT fit C4 Corvettes without FX3, or those equipped with the Z51 Performance Suspension package
• FX3 was standard on all ZR-1 models and an available option on Base Coupe and Convertible trims for 1992-1995
• Does not include upper mount bushings or FX3 actuators - these components must be sourced separately when performing a full FX3 system rebuild
• Important installation note: New replacement steel actuator gears may not fit new Bilstein shocks - the clocking on replacement units differs from the original, which can affect actuator gear engagement
• Spring seat not included - this shock does not carry a coil spring
• Sold individually - one shock absorber per unit; two required for a complete rear axle replacement

Features

• 46mm monotube gas-pressure design delivers fade-free, consistent damping performance - the seamless single-tube construction provides superior heat dissipation and prevents oil aeration under sustained spirited driving
• B6 Performance valving is approximately 20% stiffer than the original factory calibration - specifically tuned for the C4 Corvette FX3 rear suspension geometry for sharper handling response and improved body control
• Bilstein was the original equipment supplier for FX3-equipped C4 Corvettes - this shock restores and enhances the rear suspension performance these vehicles were factory-engineered to deliver
• Stem upper mount and 16mm eye lower mount correspond precisely to the C4 FX3 rear suspension attachment points - direct bolt-on installation using existing hardware
• Yellow painted finish with included yellow dust boot - Bilstein's signature B6 Performance identity, maintaining the authentic look of the factory FX3 unit
• Finely machined components provide highly sensitive and precise valving response, which is critical for optimal FX3 system performance across all three selectable ride settings
• Individually fine-tuned during Bilstein's road testing for Corvette-specific application accuracy
• Backed by Bilstein's Limited Lifetime Warranty against manufacturer defects for gas pressure shock absorbers

Specifications

• Part Number: 20-070281
• Brand: Bilstein
• Series: B6 Performance
• Position: Rear axle (left or right)
• Piston Diameter: 46mm
• Internal Design: Monotube, gas-pressurized
• Collapsed Length: 10.00 in (254.0 mm)
• Extended Length: 14.49 in (368.0 mm)
• Upper Mount Type: Stem
• Lower Mount Type: Eye, 16mm
• Spring Seat: Not included
• Dust Boot: Included (Yellow Straight)
• Finish: Yellow paint
• Ride Height: Stock (OE)
• Adjustable Valving: No
• Quantity: 1 shock absorber

Included Components

• 1x Bilstein B6 Rear Shock Absorber, 46mm Monotube (20-070281)
• 1x Yellow Straight Dust Boot

Product Description

The Bilstein 20-070281 is a B6 Performance rear shock absorber engineered specifically for 1992-1995 Chevrolet Corvette C4 models equipped with the FX3 Selective Ride Control electronic suspension system. Bilstein served as the original equipment supplier for FX3-equipped C4 Corvettes, and this 46mm monotube unit builds on that heritage with B6 Performance valving - approximately 20% stiffer than the factory calibration - to deliver sharper damping response and improved rear body control compared to aged or worn original units. The result is a Corvette rear suspension that feels more composed, precise, and planted without sacrificing the street manners that make the C4 a versatile sports car.

This part fits all 1992-1995 C4 Corvette models equipped with the FX3 option, including the Base Coupe, Convertible, ZR-1, 40th Anniversary Edition, and 1995 Indianapolis 500 Pace Car. FX3 was standard on every ZR-1 and available as an option on Base and Convertible trims. C4 Corvettes without FX3, or those with the Z51 Performance Suspension package, require different Bilstein part numbers. Upper mount bushings and FX3 actuators are not included and must be sourced separately. Buyers should also be aware of an important installation note: replacement steel actuator gears may not fit new Bilstein shocks directly, as the clocking on current production units differs from the original - professional installation and actuator fitment verification are strongly recommended.

The 46mm seamless monotube construction provides the C4's rear suspension with exceptional thermal performance. Unlike twin-tube designs, the single-tube monotube eliminates oil foaming and aeration during sustained damping cycles, ensuring consistent and fade-free damping at all three FX3 ride settings - Tour, Sport, and Performance. The shock is sold individually, two units are required for a complete rear axle replacement, and it is backed by Bilstein's Limited Lifetime Warranty against manufacturer defects.