Originally Posted by
f250geier
the truck is a 1999 with the stock y-pipe. i have been warned not to open up the exhaust too much or it would start loosing its low-end power. is the edge or bullydog units any good?
I learned the hard way, stay away from the over the counter programmers! Go to Mike at 5 star. I changed the y pipe in my5.4L made a big difference.