Inside a 410-WHP Polaris RZR Pro R Sand and Dirt Build

Spend time around the Polaris RZR Pro R platform and you start to wonder how far it can be pushed while staying dual-purpose. This 2025 Polaris Pro R 4 Ultimate built by DRT Motorsports answers that. The engine package starts with a D&M Racing Stage 1 turbo kit, and its build sheet lists 410 wheel horsepower, measured at the wheels rather than the crank.

The machine was constructed by Dirt Direct Offroad, a shop located in Mission Hills, California, and it was created for the Sand Sports Super Show. It is owned by DRT Motorsports and Landon McMath, who drives the car with his family at Glamis and other southwestern trails. The build does double duty as a family rig and a rolling billboard for DRT Motorsports.

The Engine and Power Delivery

At the heart of the build sits a D&M Racing Stage 1 turbo kit. A MoTeC ECU and screen manage the fueling and timing. Underneath it rides a forged bottom end built to handle the extra load. That Stage 1 engine build is a forged package, labor included, that strengthens the ProStar Fury four-cylinder so it can take more power.

The forged package is thorough. It includes an EVP Spec stock bore CP 10.5:1 piston kit, EVP Spec BC connecting rods, and an EVP Spec ARP CA-625 11mm head stud kit to clamp the head down against boost. The shop also fits EVP Performance spark plugs and a factory rebuild kit that supplies fresh crank and rod bearings, along with an EVP steam cleaned engine block service. Each engine is assembled by an EVP Master Engine Builder.

The Stage 1 build supports up to 650 horsepower, and with a billet crankshaft it is rated to handle up to 800 horsepower. At 410 wheel horsepower, this car runs well inside those limits. If you're pricing a similar foundation, the Current Pro R Stage 1 Engine Build starts at $6,570.90 with labor included.

Breathing is handled by an Evo exhaust and header, and the build retains a rear exhaust cover. Notably, the clutch is left stock, as are the hubs and both front and rear brake calipers. The forged internals here are about surviving sustained boost, while the clutch and brakes stay factory.

Suspension Built for Clearance

The suspension work leans on Cedar Suspension Co., known here as CSC. Up front, the build runs CSC Rock Kit front control arms. These redesigned lowers delete the stock shock fork, running a replacement eyelet in its place. Hand TIG welded stateside, they arrive with grooved Delrin bushings and grease fittings for serviceability. The payoff is clearance: CSC lists roughly 4 inches of extra room up front with the new lower design.

At the rear, CSC Desert Series trailing arms use strong steel, reinforced with gusseting inside and out. They are hand TIG welded and bolt on using the factory mounting points, so installation does not require cutting or custom brackets. CSC puts the gain back there at about an inch.

Shock duty falls to MTS. The front shocks are MTS at stock wheel travel. The package also brings an MTS spring kit with valving, backed by MTS limit straps to rein in droop. The A-arm geometry stays close to factory dimensions: the front A-arms are HCR at stock width, and the rear A-arm and trailing arm are HCR at stock length. The width and length stay stock while the arms add strength and clearance.

Steering and Rear Geometry

The steering and rear-toe hardware comes almost entirely from Kryptonite. The build runs Kryptonite tie rods for 2022–2024 Polaris Pro R/Turbo R, which Kryptonite currently lists as its Stage 2 tie rods. Each tie rod joins a 1-1/4-inch 6061 aluminum hex body to chromoly outer ends, then finishes with uniballs bored to 3/4 inch and adjustable rod ends.

Rear toe is handled by Kryptonite's adjustable Pro R toe links, cut from 4140 chromoly with fine threads for precise adjustment. Rather than fuss with the factory cam system, the links swap in an easy-to-reach frame-side adjuster and lock in place with dual pinch nuts.

The shifter gets attention too. The Kryptonite Roller Bearing Shifter for the 2022-and-up Pro R mates a billet aluminum body with sealed bearings. Its revised geometry keeps the cable pull straighter and frees up room where the driver's hand meets the dash. Joint wear is addressed with a Kryptonite Ball Joint Package Deal for Polaris Pro/Turbo R/Pro S. That kit brings two uppers and two lowers. Each rides on a heat-treated 4140 chromoly stud, with oversized internals and serviceable grease ports.

Wheels and the Two-Surface Tire Plan

The build was clearly conceived to switch between sand and dirt. Tire size is 35 inches front and rear. For sand duty it runs Sandcraft 35-inch Destroyers, with a set of 35-inch STU paddles available for pure dune work. For dirt, the car swaps to GBC Parallax tires. A swap-friendly tire carrier handles the two-set approach, and this one holds up to a 35-inch tire.

Wheels come from two suppliers depending on the look. The build features Metal FX wheels and Price Designs wheels, with the Price Designs set running 17-inch rears and 15-inch fronts. Those Price Designs wheels carry chrome faces and chrome beadlock rings, part of a finish theme that pairs chrome-faced wheels with forged carbon details.

Body, Cage, and Lighting

Protection and structure draw on several vendors. TMW supplies the cage and bumper. The front bumper is a DRT Motorsports V2 front winch bumper, matched by a DRT Motorsports rear bumper. The frame wears DRT Motorsports' complete Pro Series lineup. The sway bar links, radius rods, and trunk/pull plate come from Electrik Offroad.

The cabin and body include Sparco seats with seat mounts and harnesses, a custom aluminum roof finished with a Legacy Products ragtop, a trunk enclosure made by DRT Motorsports, and DRT mirrors with light brackets. Carbon fiber pieces come from Fourwerx in a forged carbon finish. The car wears a custom Proline wrap over Lamborghini Arancio Borealis paint, with a front grill designed to match the Polaris fang design.

Lighting is a full KC HiLiTES package. It runs a 40-inch FE bar and FE4 Mini bumper lights up front, plus a P3 chase light and rock lights, with Cyclones pressed into chase, dome, and taillight duty. Communication runs through Rugged Radio car-to-car gear for in-car and air use.

This build was showcased before the 2027 RZR Pro R Boost, the factory-turbocharged model, reached dealers. Polaris had announced the Boost, but it had not yet arrived at dealerships when this car debuted.