Ghosty, '07 V8 Limited, only mod is dual exhausts, magnaflow single in, dual out, so not really dualed all the way. Anyway, I'm like A1cntrler, 18,000 miles on the truck, 8000 since I reset the MPG computer deal, it is reading 17.0 mpg. I'm about 50/50 highway and city. I love this truck. (I...