side exhaust question

I had my side exhaust built by a small exhaust shop by my house. I used used my existing mufflers and only paid a total of $140 for the side exhaust and tips (mufflers back). They used 2 180 degree mandrel bent pipes (one for each side) at the mufflers. then used their pipe bender for the rest. I also bought 2 $20 duel exhaust tips from pepboys, and had them cut flush with the side skirts.