I did it myself and it took about 2 hours cuz it sucks removing rusty bolts without the right tools, and the rubber hangers also sucked. However, I later took it to a shop to have them weld in the Magnaflow x-pipe/muffler and bend the hangers/pipes so that the tips line up with the bumper cut-outs. That cost me $150... the tiiiny holes connecting the H-pipe in the KCR exhaust were causing a very annoying and audible chirping sound at idle.

 

Can I know what shop? and where?

 

Many shops want upwards of $150..I was in a rush to get my HKS rear section on until I got quoted the $150 so I waited till night time to take it to my buddie's shop and got it done for free99

If you're located in Socal R&J can do it on the cheap they open after 6pm.