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The stock radiator on the Polaris RZR 4 is surprisingly thin. With slight changes to the front end, under heavy loads, or up hills, it is not uncommon for the Polaris RZR 4 to overheat, blow gaskets, spew coolant, or go into limp mode. If your rig is tuned properly and the fans turn on at lower temps, you’re starting in the right direction. Split tank coolant systems like those by HTC and OHV are also quite good at keeping temperatures down. They remove the thermostat, block off the hot recycle line between the engine and water pump, and split the engine and intercooler radiators into two separate systems, allowing them to each carry their own cooling load. But while split systems, intercooler relocation kits, and tune jobs can help a great deal, in some instances, the best route is to swap out the stock radiator and replace it with an aftermarket Polaris RZR 4 radiator.
The TCP setup, for example, is super nice and one of the best things you can possibly do for your RZR. Not only does the radiator/intercooler/fan mod keep your ride cool, but it also looks cool and is beefy as hell. Sure you can go with a voltage regulator, a reflex kit, or gut the catalytic converter from the OEM muffler to reduce heat, but if you ride in hot climates and push your machine to the max, these quick fixes may not do the trick. Be it a heavy-duty radiator from SuperATV, a radiator/heat exchanger combo from CBR Performance Products, or a complete cooling package from TCP Performance, at Everything Polaris RZR, we’ve got the right parts to prevent your RZR from overheating.