Double adjustable means you can tune compression and rebound seperately from each other. Single adjustable means the adjustments are always equal for both.
An example would be for street, you'd probably set both at 6 clicks... for drag racing, you'd go full hard on the compression, and full soft on the rebound. With a single-adjustable, you don't have that ability.
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Derek Kiefer, member of Minnesota's Northstar Chevelle Club
69 Malibu Pro-Touring - 69 SS396 3spd - 23 Model T roadster pickup
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