I put a mtn max extension on my srx and put my srx cooler in. I have a 144 x 2" track on it and there is no problem with the track hitting the cooler when it bottoms, you have nothing to worry about there. There is a little modding to do to the tunnel extension where the cooler nipples come out the side, a little trimming with some metal masters did the trick. But, if I recall correctly, the mtn max has 3/4" cooler hoses, where the srx has 1" ones. If you use the srx cooler you will have to reduce the hose size somehow to fit your mtn max plumbing.