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how loud would a flowmaster 40 dual exhaust be with stock cat?

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Old June 21st, 2010, 8:30 PM
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Default how loud would a flowmaster 40 dual exhaust be with stock cat?

i have a 93 silverado with a rusted exhaust. Theres a nice sized rust hole in the muffler and the tailpipe has big rust holes in it. The muffler shops around here cannot do true duals without a cat because of federal law. Would a original flowmaster 40 with 3 inch piping and 2 tailpipes coming out of the sides be any louder than stock? Would you be able to hear me coming up the street or is it not that loud?
Old June 21st, 2010, 9:23 PM
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I am not sure how loud it would be but I am sure it will be louder than stock and sound pretty good.

Last edited by MDTAHOE; June 21st, 2010 at 9:39 PM.
Old June 21st, 2010, 9:24 PM
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youtube it
Old June 22nd, 2010, 2:34 PM
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I just installed a Flowmaster, duel exit out back, 40 seriers on my 09 silverardo v6, 4.3 it sounds great, a little poppie at sometimes but I thinks it because of the v6. Nice low mouning when I exited the garage I park in at work. I think you like it.
Old June 22nd, 2010, 6:30 PM
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if you have a v8 it would sound good. i have an 04 that i put an exhaust system on with 40 series flowmaster single in dual out and it sounded good but wasnt loud enough for me. so i put a 10 series race muffler on my truck. its pretty loud and sets off alarms. the 40 series wont be near as loud but youll still be noticed.
x2 with davey.
Old June 22nd, 2010, 7:35 PM
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I have an '04 Silverado 5.3L and recently had a Flowmaster "50 Series" exhaust system installed. My truck has factory-installed dual cats; and I have true duals with twin pipes, two mufflers and dual pipes straight out the back.

It sounds awesome - louder than the '70' Series mufflers, but quieter than the '40' Series Flowmasters. Nice, throaty idle - aggressive sound under acceleration and it quiets down a bit once I get up to highway speed. You hear my truck coming, but it won't wake the dead. I often leave for work at 3am, so I try to be nice to my neighbors. LOL!


P.S. Flowmasters are warranted for life, at least where I got them.
Old June 30th, 2010, 7:05 AM
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Originally Posted by s34n
if you have a v8 it would sound good. i have an 04 that i put an exhaust system on with 40 series flowmaster single in dual out and it sounded good but wasnt loud enough for me. so i put a 10 series race muffler on my truck. its pretty loud and sets off alarms. the 40 series wont be near as loud but youll still be noticed.
x2 with davey.
From what I know of, I think the 10 series are best suited for racing applications. They're so aggressive, where does your truck ply?

Last edited by gordonjj; July 14th, 2010 at 3:38 PM.
Old December 22nd, 2010, 11:52 PM
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How much does the 44 super flowmaster cost with installation?
Old December 23rd, 2010, 2:50 PM
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well when i bought the super 44..it cost $120 for jsut the muffler.. but i bet there like $60 now IF that.. and 20-40 extra to install..
Old December 30th, 2010, 8:11 PM
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Loud!!!!!!


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