I have seen on here where people are running 128" tracks. I am almost positive that my track length is 121" on my 06 GT. What is done/bought to get a longer track? Has anyone put a different longtrack carriage under a Apex?
Ulmer Racing sells the 128 extensions. You can go to 128 without extending the tunnel. You currently have a 121 as you stated. Then you get to pick a track.
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