The front limitation /pre problems/ is very straight forward and simple, the ifs will tolerate about 1.25" of added geometry before you start getting cascading issues like the uca hitting the springs etc. 1.25" of added geometry is enough for 2.5" of lift. Realistically, it needs to be lower than that to avoid stuff like having the tierods push the steering rack up off of its bushings. If any of the spacer lifts had limited their setup to 1" of added geometry , they'd have useful products for those looking for over 2.75" of lift. Asking the rack, the uca to spring clearance, and for stock replacement ucas, the upper balljoint angle, to suffer twice the max optimal geometry increase is simply just asking for problems. And if someone isn't willing to put their wallet on someone's dash when theyre asked for advice, their advice isn't worth much. If it's a vehicle that's going to be driven regularly and used, noone has ever regretted anything other than the initial pinch to the wallet of the cost of the coils. If you need to cut corners, youre far better off cutting corners on the rear suspension where as long as you bump stop for them, the rear suspension won't know the difference in operating with lift pucks vs a stock setup. Ome 2927 and a pair of rsx rancho or bilstein front shocks will make a very drastic improvement to the vehicles handling both on and offroad regardless of what you do with the rear. (2790 for crd or gassers with steel and winch)