303rwhp 329rwtq 2009 crewcab 5.3 sierra

[sand man]

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