It's neither. Trailmaster markets their lift as a 3-1/2" / 4" lift. I'm not sure if that's because the final lift falls into that range, or if it lifts one end 3-1/2" and the other end 4". The lift includes 2 very beefy front coils, front control arm drop brackets, sway bar drop brackets, shorty rear AALs, and four VERY beefy shock absorbers.
I bought an MJ with a Trailmaster lift on it. IMHO the quality of the components is good, but the design of the lift is outdated. The shorty AAL and beefy front cols make for a very stiff ride, and the huge shocks don't help any. The control arm drop brackets maintain stock front suspension geometry, so I never had any problem with death wobble. However, running 31" tires at that height, the drop brackets weren't far enough off the ground and they were rock magnets on the trail. I eventually took the entire lift out and swapped it to an XJ owner for an engine and tranny out of a wreck.
FWIW the kit does NOT include an adjustable track bar. The track bar on my MJ had the axle end relocated to center the axle. The installer didn't get it quite right, and the hole was egged out anyway, so I bought a Rusty's adjustable and moved it back to the stock hole.
If the price on this rig is really right, I'd say go ahead and buy it. It's unlikely you'll break the components of the lift, but I don't think you'll like the ride if you use it as a daily driver.