To those of you with single in dual out cat back systems what was the total price you paid with parts and labor? I'm interested in adding a magnaflow or dynomax catback system to my truck to give my 5.4 a nice growl. I'm thinking about having the pipes exit like this with stainless tips :

 

Nice! I went with a single pipe about 2 years ago on my 2000 5.4 it ran me $380.00. I want to do the same with my 2008 4.6