SHOCK 3 WAY ADJUST FORD FRONTSuit Buick, Chevrolet, Ford, Mercery, Oldsmobile, Pontiac From 1955-86Part Number: MOC2610 Competition Engineering's 3-Way Adjustable Drag Shocks are designed to allow the racer to dial-in the race car to meet changing track conditions. Shock valving plays a very important role inthe way your car will perform both during initial launch andthroughout the quarter mile. The principle behind our shock absorber design is to allow the front end of the race car to rise rapidly upon initial launch, creating greater weight transfer and better traction to the rear tires. As the car travels down the track, the front end will gradually descend to its ride height without unloading the rear tires which is a major cause of wheel spin. Our rear shockswork in conjunction with our front shocks making the transition from initial launchto top end charge as smooth aspossible. Competition Engineering's Rear Drag Shockscan be adjusted for changing track conditions by simple compressing and turning the shock. For slick tracks, set to the 50/50 adjustment; on good tracks, set to the 70/30 for better weight transfer. Competition Engineering's Front Drag Shocks are adjustable in threeratios: 90/10, 80/20 and 60/40. These ratios reflect the percentage of force required to extend and compress the shock absorber. You can quickly change the valve setting by simply compressing the shock fully and rotating the shaft until the indexing notch mates with the desired setting on the body. It’s as simple as twist and click. Our Rear Drag Shocks are also adjustable in three ratios: 70/30, 60/40 and 50/50. These ratios also represent the percentage of force required to compress and extend the shock unit. Only this time, the first number is compression and the second extension. These shocks also adjust by compressing them fully and rotating to the desired setting on the body. Extended Length: 15.34"Collapsed Length: 9.62"Diameter: 1.63" Application : Buick Fullsize 1971-84Buick GS1964-67Buick Skylark 1964-67Buick Special 1964-67Chevrolet Bel Air1955-57Chevrolet Camaro 1970-81Chevrolet Chevelle 1964-67Chevrolet Corvette 1963-82Chevrolet El Camino 1964-67Chevrolet Fullsize 1955-57Chevrolet 1965-86Chevrolet Malibu 1964-67Ford Elite 1974-79FordFairlane 1972-79Ford Fairlane 1957-59Ford Fullsize 1965-86Ford LtdII 1977-79Ford Torino 1972-76Ford Ranchero 1972-79Ford Thunderbird 1967-79Mercury Cougar 1974-79Mercury Fullsize 1965-86Mercury Montego 1972-76Oldsmobile Fullsize 1971-86Pontiac Firebird 1970-81Pontiac Fullsize 1963-86Pontiac Grand Prix 1962-68