2027 Polaris ProStar S4 INDY® SP 137

Meet the 2027 Polaris ProStar S4 INDY® SP 137 in —a trail sled that looks fast standing still and feels even quicker once you squeeze the thumb throttle. It’s built to turn winter roads into your personal highlight reel, pairing sharp MATRYX aluminum chassis attitude with the kind of smooth, confident power that makes you hunt for the long way back to the cabin.



At the heart of it is the ProStar™ parallel twin: a 998cc, liquid-cooled, 4-stroke that fires up with electric start, sips regular gas, and feeds its punch through fuel injection for crisp response when the trail goes from mellow to “let’s see what it’s got.” Power delivery stays seamless thanks to a CVT with belt drive and a P-22 / TEAM BOS clutch setup—so acceleration feels clean and predictable, whether you’re rolling out of a corner or stretching its legs across a wide, groomed straight. And when it’s time to back into a tight parking spot or shuffle around the trailer, reverse makes life easy.



This INDY SP is a trail machine through and through, sized to feel planted without feeling bulky. Its stance sits at 42.5 inches, and the chassis measures 120 inches long, 47 inches wide, and 46 inches tall—a balanced footprint that’s ready to thread through wooded sections and still feel stable when the pace picks up. With a dry weight of 592 lbs and an 11.5-gallon fuel tank, it’s built for real rides, not just quick laps around the neighborhood.



Point it into the next set of turns and the front end does what you want—now. The independent A-arm front suspension with 9.5 inches of travel works with Polaris IFP adjustable gas shocks (coil-over) to keep the skis tracking cleanly, while the Pro-Steer™ composite skis and carbide skags bite into the trail for confident steering feel. Out back, the PRO-CC rear suspension brings 16.2 inches of travel with two rear shocks plus a center shock—also Polaris IFP adjustable gas—so you can tune the ride for your style and your trail conditions. The result is a sled that stays composed when the groomers get choppy and stays fun when the corners stack up.



Grip, comfort, and practicality are handled with the stuff you actually notice on a long day. You get a mid-height tinted LED windshield to take the edge off the wind, heated driver grips with adjustability for changing temps and gloves, and a one-piece vinyl seat that keeps you locked in without feeling restrictive. The skid-resistant floor area, rubber hand grips, hand guards, and protective touches like a belt guard and snow guard round out a package that’s ready for the season—not precious, not fussy, just purpose-built.



And when you need to scrub speed quickly, the S4 Stealth brake with a hydraulic rear disc delivers dependable stopping power. Keep an eye on the ride with gauge-based fuel level and temperature warnings, then get back to what this sled does best: making trails feel smoother, corners feel tighter, and winter feel like it lasts a little longer.



If you want a trail snowmobile that blends strong 4-stroke performance, tunable suspension, and a sharp look in , the 2027 ProStar S4 INDY® SP 137 is ready to turn every ride into a reason to plan the next one.