I have a set on my 4.4i. Chelsea and I put them on about 6 months ago, because the prototype set that were on it, weren't valved ideally. They're excellent. A lot of adjust-ability, and they hold up great. The prototypes had about 50k hard miles on them(long-distance towing and occasionally jumping the truck!) and the shaft seals still looked basically new. I highly recommend these coil-overs for any car, as they punch way above their weight-class, for what they cost. Also, I'm fairly certain they'll do custom spring-rates/valving for little to no additional cost. They really are an excellent product