I bought a used ExpertX a while back that had straight rate(stock ones are progressive rate) springs on it. Got it all bolted in the sled took the sled for a ride and rode like a board. Sent the shocks out to Aaron at Excell Motorsports, re-installed the stock springs and revalve the shocks and my the sled rode the way it should have. Dont ask why but I tossed the springs cause Aaron had told me that the spring rate was so stiff they were seriously useless and he didnt even want them for free. I know at the time we was thinking of dropping Ad Bovin products, but I have no idea if he did or not. Best bet is to contact them and see if the have any answers for ya.
How many miles are on the shocks?
