These are SuperATV Gear Driven Performance (GDP) portal gear lifts, sold by CATVOS. A portal kit lifts the machine at the hub and builds a gear reduction into the portal box, so you can run a taller tire and still have torque at the wheel. Because the reduction sits after the axles, prop shaft, differential and transmission, those parts do less of the extra work.
Kits are offered in cast or billet aluminum housings, with a single idler or a dual idler gear set, depending on the size and machine. Dual idler boxes add a second idler gear so the load is spread across more gear surface. Gears are 9310 steel. Backing plates are 5/16" steel alloy.
A SuperATV frame stiffener can be added for $206.95. Extended brake lines are already part of the GDP kit; the source listing still asks yes or no at no charge so the order can be confirmed.
Will fit
Polaris RZR Pro XP and Pro XP 4, 2020+. 4" portals only on this listing. Wheel requirements: 14" or larger wheel, no more than 5" backspacing, not compatible with dual beadlock wheels, center bore at least 3.25" (82.55 mm) or a 1" wheel spacer.
Wheel requirements
14" or larger wheel required. Cannot exceed 5" backspacing. Not compatible with dual beadlock wheels. Wheels need a center hole of at least 3.25" (82.55 mm) or a 1" wheel spacer.
Kit includes
- Four assembled portal hub boxes with 9310 gears, seals, output shaft, gaskets, and thrust bearings
- Four universal hubs and precision-ground stainless steel slotted rotors with lugs
- Four specialized steel alloy backing plates
- Four steel caliper mounting plates
- Steering arms / steering hardware as required for the machine
- Extended brake lines
- All required hardware (including the recessed castle nut socket; some kits also include a heim installation tool or steering stops on dual-idler configurations)
- Optional SuperATV frame stiffener, when offered as an add-on
Call CATVOS at (318) 603-5451 if you need help choosing a lift height or gear reduction.
