GMC Sierra Flowmaster Super 10 vs Stock

My truck got a new muffler on er

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GMC Sierra 5.3 Flowmaster Super 10 Series Before & After!





Flowmaster 40 series vs Super 10's
1989 K5 Blazer, stock tbi 350, Hedman 69230 headers, 2 1/2'' true dual Flowmaster American thunder 40 series with 15'' long 3 1/2'' tips. vs 2 1/2'' true dual Flowmaster Super 10's with 18'' long 3 1/2'' tips.





Flowmaster super 10's on my 2004 GMC Yukon Denali 6.0
Short video on my latest (and last) Exhaust. 2 flowmaster super 10's with 1 in 1 out and 3'' inlet/outlet.





Flowmaster super 10 "2008 GMC SIERRA"
I just installed my new Muffler Flowmaster Series 10 on my 08' GMC Sierra 3 inch inlet 2.5 dual out, the sound is aggressive and nice for a V8 5.3! sorry with the shitty quality recorded by Xperia Pro




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