GMC Sierra 1500 Flowmaster Exhaust

stock 305 motor drive-by at approximately 1700 RPMs in third gear.

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Flowmaster Muffler Comparison
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Gmc with dual super 40 flowmasters.
This is a quick video of my truck (92 gmc 1500 4wd 5spd) with the dual super 40 flowmasters and no cats





GMC Sierra Flowmaster With No Cats
Did a little cat-delete to free up some more power.





2001 GMC 1500 With Flowmaster Super 40
My Old Truck from a while ago. I know drive a 2009 Siliverado ext Cab. I hope to get some new pipes on it, and put my strobes back in it. Specs: 4.8L V8 K&N Full Intake and filter 4x4 Z71 Off Road SLE Newly Added 285 75 R16 Dakota Mud Terrains. I have also added a Cobra LTD25 CB and 2 4Foot Whips which are bolted to my Chrome Delta Deep well toolbox. I also have a 4 way Recon Strobe Kit, and Able 2-Sho-Me Led light dash light. Pipes- Flowmaster Super 40 Single in Dual Out before the tire.




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