Went to get estimates on exhaust

and man,they charge alot!1 estimate was $530,one was $740,and im now thinking of just getting the Summit kit for my Duster.Now I have questions
Hows the fit?
How do the mufflers sound that come with the kit?
Is welding needed?
And is there any cutting or modifying?
Im thinking of just getting the 2.5 pipe
Any help would be great :cheers: