ive got a set of these and ill tell you now g-max, jamex, x-maxx and Hottuning Coilovers are all the same kit, altho dampers may vary not to sure on that tho cos they still look and have same part number.
the kit ive got to be fair i didnt use the shocks, i used spax non adjustable.
i 1st ran the kit right down and OMG it was the worst ride in the world. even with full lenght bump stops you have about 1/2inch of travel and its a solid metal to metal bang, its very very dangerous and no way usable.
i have now fitted a grp n top spring pan for there coilover kit. if you cut the top smaller section of the spring off itll fit inside the grp n item perfectly, as my shocks were shortened i was far from ever disslocating the spring. im not sure how a standard shock will do.
after id done this and used just one section of the bump stop its 100times better than it as. i seriously recommend it to anyone with this kit.