The Best Power and Performance GDP Portals aren™t an average upgrade”it™s a massive boost to power and performance. With a Yamaha Wolverine RMAX 1000 4 Portal Gear Lift from SuperATV, you get more ground clearance and torque”the perfect combo. The lift gives you room for big tires, and the gear reduction gives you the torque to turn them like stock. You™ve got the option to add a dual idler, too, which improves strength even more. Plus, it™s built with the quality that sets GDP apart. What Is a Dual Idler®? Perfection takes time. After years of research and development, we™ve made our dual idler gear portals unlike any other. By placing a second idler gear in the portal box, the load gets spread over twice as much surface area for more reliable torque transfer and the strongest gear set you can get. Two idler gears don™t do a thing if they™re not mated perfectly, though. Precision CNC grinding ensures ours do. Our gears are made from the industry™s toughest 9310 steel alloy. Didn™t think dual idlers mattered? With GDP™s quality and experience, they finally do. Ride Anywhere You Want No matter how you ride, GDP Portals can make your Wolverine more capable. With a 15% gear reduction, you™re ready for any kind of riding. Hit the trails, creeks, dunes, and desert with tons of torque that won't slow you down. Go with a 30% gear reduction if you want to take wild rides with big tires. It™ll pull you through slop and rocks like they™re not even there. A Gear Reduction That Protects Your Drivetrain GDP Portals lower the wear and tear on your drivetrain despite giving you 4 inches of lift. How? Because the gear reduction is in the hub, everything before it works less. Your axles, differential, prop shaft, and transmission all benefit from it too. Not to mention, you maintain factory axle angles for even more durability. Strength Throughout Strength is the most important part of any big lift, including portals. A weak part might as well get left in the garage. That™s why our cast and billet aluminum housings are the thickest and strongest you can get. Combine that with 5/16 backing plates made from an advanced steel alloy, and our portals are unstoppable. Our housings are reinforced for gear retention and optimized for oil flow Advanced steel alloy backing plates are stronger than chromoly Enhance with Portal Blood ”gear oil formulated for GDP Portals There are no gimmicks and no vents because vents do more harm than good”we know because we tested them Advanced Gaskets, Seals, and Bearings Our portals use: Advanced gaskets and O-rings with excellent oil resistance and low deterioration rates A sealed input gear and double-lipped output seal 100% sealing coverage throughout so you can forget about oil leaks Double-angular contact output bearings to prevent premature wear Roller idler and drive bearings to maintain perfect gear meshing Top-Rated Customer Service Intimidated by GDP Portals? Don™t be! We have specialists on the phone ready to answer any and every question you have about our portals. Trust us, we™ve seen it all. Give us a call and we™ll give you real advice backed by real experience. 4" Portal Gear Lift Includes: (4) Assembled portal hub boxes complete with 9310 gears, seals, output shaft, gaskets, and thrust bearings (4) Universal hubs and precision-ground stainless steel slotted rotors with lugs (4) Specialized steel alloy backing plates (4) Steel caliper mounting plates Extended brake lines All required hardware, including recessed castle nut socket Max Tire Size Recommendations for 4 Portal Gear Lift Max Tire Size Required Suspension Setup with GDP Portals 31" Stock 36" 1.5" Forward Offset A-Arms If you need help figuring out which gear reduction is right for you, check out our portal gear reduction calculator . Max tire sizes are measured at full compression and full turn. The given tires sizes are the largest we fit without rubbing. With minor trimming or a small amount of rub, larger tire sizes can be used. Patent # 11,299,042 Patent # 11,318,787