21 hardcore tunnel/heat exchangeer questions

[Pinchecharlie]

I have a 21 hardcore 154 that I want to bolt a ski rack onto. I looked at the parts break down and can't tell (new to snowmobiles and dumb) if the coolant is built inside the tunnel? I just obviously don't want to drill holes in it lol. Is there a way to tell on snowmobiles in general. My little blast has an external tube you can see. Thanks Charlie

 

[ndfb35]

Cats heat exchangers are quite short and don't go past the seat.

So if you are drilling into the rear section of the tunnel you have nothing to worry about.

 

[Pinchecharlie]

Thanks

 

[bgraff1]

stick your head under the tunnel and look up lol you see it, its very visible if its in the way