To avoid any fitment issues, please make sure to select the exact year, make and model of your vehicle. If you are unsure, please reach out to us for assistance prior to purchasing. Not that this part is built-to-order and NON-RETURNABLE. This part must be installed by a licensed professional to avoid any issues related to the complex installation

Gear Down and Go Big
Your side-by-side is about to get even better. Put 8" GDP Portals on your ride and you open up a whole new world of fun. With a huge increase in ground clearance and a massive 45% or 60% gear reduction, you'll blaze a new trail and go everywhere your buddies can't.

GDP—the Most Trusted Name in Portals
When you choose GDP, you're not choosing the odd man out. More people roll on GDP portals than any other portal system. They're the most trusted and the most trail proven. And with thousands of riders hitting the trail every weekend, it's about time you joined the club.

Perfect for Mud
Portals and mud go together like chocolate and peanut butter. With all that extra ground clearance and torque-boosting 45% gear reduction, you'll roll over and push through any mud hole you find. Run monstrous tires and dominate the deepest sludge with a 60% gear reduction. If you want to do mud the right way, you want GDP.

A Gear Reduction That Protects Your Drivetrain
A portal gear reduction protects your drivetrain because the reduction happens in your hub instead of in your transmission. That means your axles, differential, prop shaft, and transmission will wear less than stock even if you ride harder than stock. It's a win-win.

Unmatched Gear Material
Our 9310 alloy steel gears make these the most top-of-the line gears you can get. On top of being bulletproof, these precision-ground gears mate perfectly each and every time so you get smooth, quiet portals no matter how hard you ride.

Stronger Housings by Design
Think you can get a stronger portal housing than GDP? Think again. It takes precision engineering, consistency, and unmatched experience to make a housing that can stand the test of time. That's exactly what we've done. So whether you get a cast aluminum or USA-made billet aluminum housing, you're getting the most used, most abused, and most trusted housing on the planet.

• Our housings are reinforced in all the right places
• They're built with better oil flow and gearing forces in mind
• There are no gimmicks and no vents because vents do more harm than good—we know because we tested them

The Strongest Portal Backing Plates You Can Get
You can't skimp on backing plates because they're what holds your hubs to your suspension. That's why we use a premium steel alloy that's stronger than chromoly and designed for ultra-high force applications. At 5/16" thick, these hand-weld plates won't bend or break even when you're hitting jumps and diving into bounty holes. They're the last thing that'll break on your machine.

Advanced Gaskets and Seals
Whether you go with cast or billet, both housings use:

• Advanced Thermo-Tork gaskets with excellent oil resistance and a lower deterioration rate than Kevlar gaskets
• Rubber O-rings that completely seal the housings
• A sealed input gear and double-lipped output seal
• 100% sealing coverage throughout so you can forget about oil leaks

Bearings That Rock
We don't cut corners on our bearings either—from top to bottom GDP is built for battle. Our output shaft rolls on a double-angular contact bearing that's designed to survive you smashing into rocks and stumps. They'll keep your output running true no matter what.

Universal Hubs and Slotted Rotors
Our precision-ground, stainless steel slotted rotors stay cool to give you the braking power you need when you need it. They come with 4/156, 4/137, 4/115, and 4/110 bolt patterns and lugs. These are the most popular bolt patterns and it makes your life easy—just about any side-by-side wheels you get your hands on will work with these hubs. We invented the tapered output shaft that our hubs attach to, which provides a more secure lock that won't wobble or wear over time.

Reinforce Your UTV with a Frame Stiffener
Your ride is brutally fast and an awesome side-by-side, but that doesn't mean it can handle everything. An 8" GDP portal kit is a heavy-duty piece of hardware for heavy-duty machines. That's why 8" portals require a frame stiffener. Trust us—we've hit enough bumps to know that bending a stock frame can happen. Don't do it. Get a frame stiffener.

Portal Gear Suspension Recommendations

8" Portal Gear Lift Includes:

• (4) Assembled portal hub boxes complete with 9310 gears, seals, output shaft, Thermo-Tork gaskets, and thrust bearings
• (4) Specialized steel alloy backing plates
• (4) Universal hubs and precision-ground stainless steel slotted rotors with lugs
• (2) Rear bearing carriers
• (4) Steel caliper mounting plates
• (2) Heavy-duty lower ball joints preinstalled
• (8) Caliper mounting plate spacers
• Extended brake lines
• All required hardware, including recessed castle nut socket
• Frame stiffener (must select)

FEATURES

• Available with billet or cast aluminum housing
• Cool, quiet, precision ground gears made from 9310 alloy billet steel
• 1.5 in. forward and rear offset
• Increases width by 4 in. per side (8 in. total)
• 1.5 in. diameter 4340 hardened steel driveshaft
• Housings use Thermo-Tork gaskets and rubber O-rings that don't let anything through
• Universal hubs can be set up to work with the following bolt patterns: 4/156, 4/137, 4/115, and 4/110
• Gear reduction reduces stress on your drivetrain