I know it helps but I cannot tell you how much because I did the exhaust and programmer at the same time. I went fron 15-16 to 19-22 on the highway runnin 70. You will not see the gains I did because you truck is heavier.
__________________ 06 2500 CREW CAB 4X4 LBZ
4" DIAMOND EYE EXHAUST, KITTY RAN OFF!!!
DIABLO @ 120HP. 285/75 BFG's RUNNIN ON ULTRA 16's
PIONEER HEAD UNIT RUNNIN SCOSCHE AMP W MTX TWINS
AIR BOX IMPELLER REMOVED!! RESONATOR PLUGGED !!!
AUTOMETER ULTRALITE GAUGES IN POD. TRANSGO JR WORK RIG
O7.5 3500 CREW, LMM, ROYAL UTILITY BED
4" DIAMOND EYE EXHAUST.DPF???KITTY?? QUADZILLA PROGRAMMER. MTX AMP AND 10" TWINS IN THE BACK. STEPS,VISORS,BUG SHEILD. AIRBOX IMPELLER REMOVED,RESONATOR PLUGGED,LOTS OF PRETTY DIAMOND PLATE EVERYWHERE
You will love this truck! I use mine for work, have over 200,000 on it and am very satisfied.
__________________ 07 classic crew cab long bed 2wd
3.73 rear, stock tire size
bully dog w/outlook ,bully dog cold air and 5 inch turbo back, with 6 inch tip.
replaced stock tank with a 55 gallon aftermarket tank
5% tint on all windows, and "eyebrow" on front windshield.
__________________ 2006 Crew Cab SB 4x4, Stock LBZ, Black with Gray leather, Factory Steps. Black H2's with 295/70/17 Nitto Terra Grapplers, Magnaflow 5" SS turbo back, Diamond Eye Downpipe, SCIV and 1058(Fleece Performance), SC Case Brace, 68mm Cheetah, EFI Live, HP 150 lift pump, Auto meter gauges and pod, EGR Blocker and FRPV shim kit,
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AFE Stage II CAI - Predator tune 
To the site. I too have an LBZ and trust me dump the cat run a 4" all the way back it"ll like you for it.
08 Chevy Silverado 2500HD Crew 4x4 
Linear Mode
