quad xzt
my friend has the quadzilla its a good chip. lots of smoke and power. its a little agressive 'i think'..ive heard there timing is reel high and the injection pump might not last to long. you should look into a smarty.
they are good for the mid power range. i am very happy with mine the 3 way switch is very nice if you want power or you want to go fuel mileage at just a flip of a switch. the online updates are nice to you can get all sorts of stuff not more power just different ways of fueling. with rv275 pretty good smoke cloud till the turbo comes in
BETA comp tune, Its not more fuel its a different way of fueling, but its the best for power and smoke. it might make your truck surge a little out on the hi way, but the 2000 tune is just as good


