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Here is the solution for your overheating problems in marginal snow conditions. Let’s face it, with a 3" track marginal snow conditions are any time you are on the trail! By installing the MTNTK performance long tunnel cooler you will double your cooling surface area and coolant capacity. We started with a fresh design and had our own profile made because the other coolers on the market do not fit the tunnel properly and do not allow you to put the rivets back in the correct locations. This cooler is very simple to install and requires no cutting or welding to your original tunnel cooler. All connections are made between the fuel tank and the air box to maintain a stock appearance. This tunnel cooler is available in a 5 foot length for maximum cooling or 3 foot length to increase cooling without the 5' weight penalty. The 5 foot cooler and added coolant capacity totals an 11 pound gain, but the cooling cannot be overstated. The weight is far less noticeable than being stuck on the side of the trail with an overheat. With the 5' cooler you realistically maintain a 125 deg engine temp even when going down the trail. The 3' cooler will dramatically reduce temps and for most sleds it will be the solution you have been dreaming of. The engine runs much better when the heat is managed properly and you only need to be concerned about hyfax lubrication which is easily overcome with the use of the factory "scratchers". It is a liberating experience to ride without your engine overheating. We have been told that overheating on the trail is something that you have to live with because of the "modern" design of mountain sleds. This is simply not true. The weight wars on sleds has been beneficial at making sleds easier to ride and more capable but the cooling systems have become ineffective. These coolers are the answer you have been looking for.