I finally got my racer support program parts. I started installing the motoworks slip on tonight but it got too dark to finish. Plus I haven't even had it a day and I already put a little ding in it

so I thought I should take a break for the night. Anyways, I was just wondering one thing.
The slip on never came with, nor does it mention anything at all in the instructions about using a new exhaust clamp or the stock to fasten the slip on to the stock header. I would think you would need one, but the stock clamp is bigger than the motoworks pipe, and it has a little tab in the inside of it.
I was just curious if the slip on truely is just a slip on? no clamp needed? I didn't think it would be but I have no idea so I thought I'd just ask since I've never installed one before.
Thanks,