This chromoly portal box has been designed to be a bolt on package on the spidertrax axles. This portal box is unique through it's design. It's full chromoly billet and has up to 50° steering lock with Spidertrax knuckles. This box has been prooved in several competitions up to 44" boggers and 500HP without any failure. This box accepts standard mercedes unimog 404 gears or our upgraded gears. This box changes rotation which makes it cheap to buy a low pinion Ford 9" aftermarket 3rd member.