You dont have to buy a track thats notched for the coolant lines but if you dont you have to cut them in yourself. I did that twice on my ZR 800 and it seems to hold up fine. The other option is to either buy a U-cooler (fabcraft makes some), or make your own coolant lines. I made ones that run through a 3/4" pipe up in the corner of the tunnel to a heat exchanger in the back of the tunnel. Thats how my sled is now because i put a king cat suspension in it with a 162" attack 20 track on it, didn't have to cut the track and it stays plenty cold enough. Hope that helps.