LT1 Tips

I might purchase the dual tips from my friends 96 Trans Am. I was wondering if they would clamp onto my V6?

If the pipes are the same size, yes they will go right on, but I'd weld them so they don't a. leak, b. fall off, or c. rattle. If the pipes are different sizes something has to be stretched.

how much would that cost to get it welded?

take it to a smaller shop, ask them how much they'd offer... i got my exhaust leak welded for 20..