wat is a sct tune thnx for ur time

got an 04 dodge 1500 reg. cab wats the most u can adjust timing/ spark/fuel please help chevys all over me

i had a hypertec before dis one n it kept goin after 120 it stop at 128 hell i dnt knw watcha think thnkx

can i change the computer on my 04 to a 06 to get more things to mess with or no

its good then soon as hits 120 it stops speed limter raised n its tuned on 93 octane havent messed wit any thing else hope u can help thanx

u7137 9to9e crom 04 dodge ram 1500 seems to stop pullin after i hit 120 mph n u feel it hold at 120 mph wats up wit dat

have u changed the xhaust