I was looking at one of the Colorado truck forums and found these video's with sound. The guy has used a Flowmaster 50 Delta flow series. As we know the Colorado truck has the same I-5 engine.
http://coloradofans.com/viewtopic.ph...ight=soundclip
What do you think? I can always ask a local muffler shop to make a custom exhaust.
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2006 Hummer H3 Adventure, Black with Cashmere Interior, PIAA Horns, SMA Heavy Duty Brush Guard, FlowMaster 50 Series Delta Flow Exhaust
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