2009 gmc sierra 1500 5.3 LH6 with 6l80e 6 speed transmissions 4wd
specs:
AIRAID cold air intake
OBX long tube headers+ catless Y pipe
custom 3" exhaust with single 3" cutout ,magnaflow 13762 xl muffler
3" tail pipes
8mm taylor wires
NGK iztr5b11 spark plugs
dyno tuned on 95 octane saudi gas ( 93 american)
run was in 4th gear unlocked
befor tune
with cutout closed
with cutout open
with cutout closed
24 + whp
54+ wtq