On mine it's 6". 3" Calmini body lift and suspension lift combo.
If I had built it I'd have gone another route. Either an OME 1.5-2" lift or Boondox 3" lift and a 2" body lift with some fender cutting/hammering to fit 31's on less backspacing. Hey, I got it this way.
Calmini's got a so-so reputation. They make stuff and some people swear by it but they also make crappy stuff and sometimes their service is bad. Also famous for unveiling stuff they're bringing out and then never bringing it out...sorta like their SAS kit.
It's decent quality but their instructions suck and I can say for one that their coil springs ride rough. They intend for you to put a big bumper on each end and have a large spare hanging on the back with a winch on the front. I have none of that so my 3" suspension lift is more like 4", alignments are fun, and it rides pretty stiff. If you ask them about this phenomenon they say you're crazy despite people knowing about it for years now.
There's several companies either working on SAS kits, with kits, or purporting to have one. Lots of folks have done it themselves using Sami front axles, Toy axles, and stuff like Waggy axles. Even seen one on Rockwells.
Toy axle pads are about perfect for doing leaf springs on a Tracker.
Honestly though the trend right now is beefing the IFS. Do a search for a guy named Mark Hagan and you'll be surprised. Widened A-arms and mounts, Toyota axles, steel 3rd housings, BEEG tires, and a Tracker that eats Wranglers for lunch. Low unsprung weight, lightweight parts, good travel, able to go fast, etc etc etc.
Heh...there was one on eBay a while back down in Florida that had more lift than should be legal on an original WB Sami, a blown V6, neon paint, and 38" TrXus STS's. The leaf springs looked sorta like GM 20" lift springs.
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