After market boards
That's about funny, my MC tunnel is all buckled to **** from having almost 10lbs of stuff in the tunnel bag that came with the sled. Completely caved in the tunnel under the bag area and buckled the sides. I'm pissed they went with the lightweight tunnel extension, now I have to replace it with 16' style so there is some sort of strength.
Other than that its great!
Do you have after markets boards?
I'm not saying this is your problem but I've seen after market boards cause this problem.
If to much is cut away from the boards and tunnel by the rear drop brackets the tunnel can get weak and bend.
It's just something that I've seen happen.
I like vanamburgs tunnel and bumper extension.
There's a few after market bumpers that way strengthen the area that's bent on your sled.