GMC Sierra Flowmaster Super 10 vs Stock

My truck got a new muffler on er

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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 10 series F150 ((must see))
2003 f150 5.4 with a 10 series flowmaster with a crome tip dumped out the side. Added another video of inside the cab





silverado 1500 flowmaster super 10
this is my 2000 chevy silverado with a flowmaster super 10 series. take off and rev.





GMC Sierra 5.3 Flowmaster Super 10 Series Before & After!




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