Tired of carrying all that extra weight under your Arctic Cat? Patrick Custom Carbon has made a carbon fiber rear tunnel for the 2012-2013 Arctic Cat 153 Mountain sled and the shorter Sno Pro sled. Carbon fiber does not conduct hot and cold like aluminum thus eliminating much of the freezing ice/slush at the heat exchangers under the tunnel. This tunnel easily pop rivets into the same place as the original aluminum rear tunnel. You can also add a payload on to the tunnel as it is 5 times stronger than the aluminum tunnel. The weight of the carbon fiber tunnel is 3 lbs. and the original aluminum tunnel is 5.2 lbs. But the most important weight difference will be after you race/ride your sled and then compare before and after weights it could be 10-50 lbs!!!