i'm going to order thease for my truck becouse the old ones suck.
with the lwer timps and higher flow kill my gas milage?

http://i277.photobucket.com/albums/k...um-g9045_w.jpg

 

The milage should be a little better if you keep your foot out of it.[sm=americanasmiley.gif]

 

oh...

i also drive a rice burner.........so tha might be a bit had to do....
any way to re-program the com on the truck???

 

In my personal opinion, i would recommend getting a cold air intake first. You will get about 6-12 hp depending on the brand and better fuel economy. If you have lower temps in your area, then intake would be good to get first, then your headers. That way you will have a better air/fuel ratio and your mpg should either go up or hover at where it is now. After that........exhaust.....