KYB KG4515 Gas-a-Just Monotube Front Shock 1956-1996 GM/Ford Classic Cars Each

Vehicle Fitment

• 1973-1975 Buick Apollo - Front
• 1971-1989 Buick Electra - Front
• 1971-1983 Buick Estate Wagon - Front
• 1971-1990 Buick LeSabre - Front
• 1971-1978 Buick Riviera - Front
• 1991-1996 Buick Roadmaster - Front
• 1964-1972 Buick Skylark - Front
• 1975-1979 Buick Skylark - Front
• 1964-1967 Buick Special - Front
• 1987-1992 Cadillac Brougham - Front
• 1956-1984 Cadillac DeVille - Front
• 1965-1996 Cadillac Fleetwood - Front
• 1956-1964 Cadillac Series 60 Fleetwood - Front
• 1956-1964 Cadillac Series 75 Fleetwood - Front
• 1965-1972 Chevrolet Biscayne - Front
• 1967-1981 Chevrolet Camaro - Front
• 1966-1996 Chevrolet Caprice - Front
• 1964-1967 Chevrolet Chevelle - Front
• 1968 Chevrolet Chevy II / Nova - Front
• 1959-1960 Chevrolet El Camino - Front
• 1964-1967 Chevrolet El Camino - Front
• 1965-1985 Chevrolet Impala - Front
• 1994-1996 Chevrolet Impala - Front
• 1964-1967 Chevrolet Malibu - Front
• 1969-1979 Chevrolet Nova - Front
• 1958 Edsel Citation - Front
• 1958-1959 Edsel Corsair - Front
• 1958 Edsel Pacer - Front
• 1958-1960 Edsel Ranger - Front
• 1959-1960 Edsel Villager - Front
• 1957-1974 Ford Country Sedan - Front
• 1957-1974 Ford Country Squire - Front
• 1987-1991 Ford Country Squire - Front
• 1992-1994 Ford Crown Victoria - Front
• 1975-1976 Ford Elite - Front
• 1957-1958 Ford Fairlane - Front
• 1959-1967 Ford Galaxie - Front
• 1968-1974 Ford Galaxie 500 - Front
• 1972-1976 Ford Gran Torino - Front
• 1965-1982 Ford LTD - Front
• 1987-1991 Ford LTD Crown Victoria - Front
• 1977-1979 Ford LTD II - Front
• 1957-1979 Ford Ranchero - Front
• 1957-1959 Ford Skyliner - Front
• 1967-1979 Ford Thunderbird - Front
• 1972-1976 Ford Torino - Front
• 1967-1982 Mercury Marquis - Front
• 1964-1965 Nissan 410 - Front
• 1964-1967 Nissan 411 - Front
• 1965-1967 Oldsmobile 442 - Front
• 1965-1984 Oldsmobile 98 - Front
• 1964-1967 Oldsmobile Cutlass - Front
• 1967-1968 Oldsmobile Delmont 88 - Front
• 1964-1967 Oldsmobile F85 - Front
• 1973-1979 Oldsmobile Omega - Front
• 1964-1967 Oldsmobile Vista Cruiser - Front
• 1963-1981 Pontiac Bonneville - Front
• 1963-1981 Pontiac Catalina - Front
• 1967-1981 Pontiac Firebird - Front
• 1962-1968 Pontiac Grand Prix - Front
• 1964-1967 Pontiac GTO - Front
• 1977-1979 Pontiac Phoenix - Front

Fitment Notes

• Sold individually - two shock absorbers are required for a complete front axle replacement. Order two units for a full front installation.
• Position: Front - fits both left and right sides (same part number for both sides).
• Does NOT fit vehicles equipped with Electronic Adjustable Suspension (EAS), Air Suspension, Automatic Ride Control, or any electronically controlled suspension systems. For electronic suspension conversions, refer to the KYB catalog Appendix C for appropriate parts.
• Excludes commercial chassis, police, and taxi variants on applicable Chevrolet and Cadillac platforms.
• The KG4515 serves dual purposes: it is the correct OE monotube replacement for vehicles that came factory-equipped with a monotube shock absorber, AND it is a performance upgrade for vehicles that came factory-equipped with a conventional twin-tube shock absorber. Both uses are confirmed applications.
• These shock absorbers are designed for classic RWD body-on-frame vehicles with conventional SLA (Short-Long Arm) or A-arm front suspension, not MacPherson strut front suspension.
• Fitment spans an exceptionally wide range of makes and model years (1956-1996). Always confirm your specific vehicle's trim level and suspension configuration using a VIN-based fitment check before ordering.

Features

• High-pressure monotube design - completely separates the gas charge and hydraulic oil using a free-floating dividing piston, permanently eliminating the oil aeration and performance fade that affect conventional twin-tube shock absorbers.
• Delivers up to 25% more damping performance over original equipment twin-tube shocks and can increase steering responsiveness by up to 30% - making the KG4515 both a true OE replacement for original monotube applications and a meaningful performance upgrade for twin-tube-equipped vehicles.
• Two separate working chambers: an air-free hydraulic piston and valve area for precise, responsive control, plus a second high-pressure nitrogen gas chamber with a floating piston that provides comfortable damping during normal driving and instant performance on demand under aggressive conditions.
• Velocity-sensitive valving automatically adjusts damping in real time to changing road conditions and driving inputs, without driver adjustment or electronic control.
• Designed specifically for classic cars, muscle cars, and full-size RWD vehicles - valving calibrated for the larger, heavier mass of body-on-frame domestic vehicles, including those running larger, heavier aftermarket tires and wheels.
• Triple chrome-plated piston rod - ultra-smooth surface finish reduces seal friction and wear for quiet, long-term operation throughout the extended service life of the unit.
• Seamless cylinder and seamless eye-ring construction - completely eliminates seam-related failures that can affect less precisely manufactured shock absorbers under sustained use or heavy loads.
• Provides a noticeably firmer ride and enhanced body roll control compared to conventional OE twin-tube designs, reducing nose-dive under braking and body lean through corners.
• Lifetime Limited Warranty to the original vehicle purchaser - covers defects in materials and workmanship for as long as the original purchaser owns the vehicle.

Specifications

• Part Number: KG4515
• Series: Gas-a-Just
• Type: Shock Absorber (Front)
• Design: High-pressure monotube with floating piston
• Position: Front - fits both Left and Right sides
• Extended Length: 14.57"
• Compressed Length: 9.65"
• Stroke: 4.92"
• Piston Rod Finish: Triple chrome plated
• Cylinder: Seamless construction
• Eye-Ring: Seamless construction
• Gas Charge: High-pressure nitrogen
• Quantity: Sold individually (2 required per vehicle)
• Warranty: Lifetime Limited Warranty to original purchaser

Included Components

• 1x KYB KG4515 Gas-a-Just Front Shock Absorber
• 1x Hardware Kit (washers, bushings, and mounting hardware)

Product Description

The KYB KG4515 is a Gas-a-Just high-pressure monotube front shock absorber covering one of the broadest fitment ranges in the KYB catalog - fitting front suspension applications on dozens of classic American makes and models spanning from 1956 through 1996, including flagship platforms from Buick, Cadillac, Chevrolet, Edsel, Ford, Mercury, Lincoln, Oldsmobile, Pontiac, and even select Nissan models. It is designed for body-on-frame RWD vehicles with conventional SLA or A-arm front suspension - the type of front suspension architecture found on nearly all domestic full-size cars, muscle cars, and pony cars of this era. It does not fit vehicles with electronic or adjustable suspension systems, and fitment should always be confirmed against the buyer's specific trim level and suspension configuration before ordering.

The KG4515 serves a dual purpose that sets it apart from the Excel-G line: it is the correct OEM-specification replacement for vehicles that originally came equipped with a monotube front shock, and it also functions as a documented performance upgrade for vehicles that came from the factory with a conventional twin-tube design. The high-pressure monotube architecture uses a free-floating dividing piston to permanently separate the nitrogen gas charge from the hydraulic oil, eliminating the oil aeration that causes performance fade in conventional twin-tube units. The result is up to 25% more damping force than original equipment twin-tube shocks and up to 30% improvement in steering responsiveness - characteristics that translate directly to reduced body roll, less nose-dive under hard braking, improved corner control, and more confident highway stability on the large, heavy platforms this shock is designed for.

The velocity-sensitive valving system continuously and automatically adjusts damping rate in real time to match changing road inputs and driving conditions - no driver adjustment or electronic control required. Seamless cylinder and seamless eye-ring construction eliminate the seam-related failure modes that can affect lesser shock absorbers under sustained heavy use, and the triple chrome-plated piston rod minimizes seal wear for long-term, leak-free operation. Each KG4515 is sold individually - two are required for a complete front installation. The KG4515 is covered by KYB's Lifetime Limited Warranty against defects in materials and workmanship for as long as the original purchaser owns the vehicle.