Competition Engineering adjustable drag racing shocks feature three way adjustability and are designed to allow the racer to dial in the race car to meet changing track conditions. Shock valving plays a very important role in the way your car will perform both during initial launch and throughout the quarter mile. The principle behind Competition Engineering drag 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. Three adjustable ratios are 90/10, 80/20 and 60/40. These ratios reflect the percentage of force required to extend and compress the shock absorber, with the first number being extension and the second number compression. You can quickly change the valve setting by simply compressing the shock fully and roating the shaft unitl the indexing notch mates with the desired setting on the body. It's as simple as twist and click. Scroll down the page for the rear drag racing shock applications. Chevrolet drag racing shocks Competition Engineering Competition EngineeringAPPLICATIONS:: 1967-1969 CAMARO 26001970-1981 CAMARO 26101962-1967 CHEVY II 26051968-1972 NOVA 26001973-1979 NOVA 26001963-1982 CORVETTE 26101955-1957 CHEVY 26101963-1982 CHEVY FULLSIZE 26101970-1988 MONTE CARLO 26001975-1980 MONZA 26001972-1977 VEGA 2600 Competition Engineerings rear drag shocks are also adjustable in three ratios, 30/70, 40/60 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. Competition EngineeringAPPLICATIONS:: 1969-1967 CAMARO 27001970-1981 CAMARO 27101982-1992 CAMARO 27001993-1998 CAMARO 27001964-1967 CHEVELLE-MALIBU 27201968-1983 CHEVELLE-MALIBU 27201962-1967 CHEVY II 27051968-1972 NOVA multileaf 27201953-1962 CORVETTE 27001965-1986 CHEVY FULLSIZE 27201970-1988 MONTE CARLO 2720 Order quickly and easily over the internet on our secure YAHOO! system 24 hours per day or talk to a real, live sales person at 419-331-2470 during our business hours. We welcome CANADIAN customers! For ordering information, click on "Canadian Order Info" at the top left side of this page. LOW COST SHIPPING! Just $12.95 to ship your entire order by U.P.S. ground within the continental United States. Purchase any quantity of items and you pay just $12.95 to have it shipped! The more you order, the more you save! Orders to Hawaii, Puerto Rico, Virgin Islands, and some parts of Alaska will have shipping added due to having to be shipped by air freight. Customers from these states will be emailed the shipping costs for approval before we ship the order. We use Postal Priority for APO and FPO addresses only. Additional shipping charges may apply to APO or FPO addresses. Payment Methods: CREDIT cards or DEBIT cards VISA, MASTERCARD, DISCOVER, AMERICAN EXPRESS, MONEY ORDERS.