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Old Jan 7, 2009 | 10:52 PM
  #1  
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Flowmaster 70

hey everyone
i have been thinking about adding a flowmaster 70 with dual in dual out to my straight pipes on the old straight six, i was wondering if anyone had this set up and could tell me how it turned out?
i have true dual with no cats or mufflers now and its loud and i like it but want it quieter with a good tone to it.
jared
 
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Old Jan 8, 2009 | 02:24 PM
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From: Spokane, WA
Loud, quiet, tone,...anything to do with sound is all in the ear of the beholder. Check out the sound clip "Sticky" at the top of this Forum.
 
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Old Jan 10, 2009 | 07:43 PM
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From: Almost Heaven
I never did like any of the quieter Flowmaster's I've heard. Not sure what to tell you. Is your pipes ran all the way out back to your bumper? That is the biggest thing to keeping your cab quiet.

I would just keep the straight pipes and run them out back if they aren't already. A 40 or 44 series will quiet it down some, if that is what you're looking for. If you want something that actually makes the truck much more quieter, look into a Dynomax muffler or something like that.

I personally love the sound of a straight piped I6.

Here's a clip of mine with a 44 seires Flowmaster. YouTube - F150 Cold Start / Mounting Ramps
 
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Old Jan 11, 2009 | 12:21 AM
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ya she is straight out the back....2 1/4 pipes from the manifolds back into 3 1/2 or 4 by 20 tips.....it doesnt sound bad to me but after like 3 months i am ready for quiet on this truck....i want it to be quiet inside but have a nice little tone to it on the outside nothing loud, i have an appointment with my muff shop and i am getting a dual in daul out 70 put on for 75 bucks....the muffler guy had a almost new one that he is putting on for that price, i saw it and it looks good. and i guess is i ant happy with it later i wont be out much money since i ant dumping the ungodly high price of 160 for a new one!
 
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Old Jan 11, 2009 | 06:38 AM
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From: Almost Heaven
Originally Posted by Fox_Racing
ya she is straight out the back....2 1/4 pipes from the manifolds back into 3 1/2 or 4 by 20 tips.....it doesnt sound bad to me but after like 3 months i am ready for quiet on this truck....i want it to be quiet inside but have a nice little tone to it on the outside nothing loud, i have an appointment with my muff shop and i am getting a dual in daul out 70 put on for 75 bucks....the muffler guy had a almost new one that he is putting on for that price, i saw it and it looks good. and i guess is i ant happy with it later i wont be out much money since i ant dumping the ungodly high price of 160 for a new one!
I don't know what to tell you man. I ran my pipes out back and my cab is nice and quiet. I get a quiet rumble inside the cab and a bit of a roar when I give her a lot of throttle. It doesn't hurt anyone's ears and it's not annoying. I don't know why yours is so loud. I assume because it's straight piped.

Just put a long glass pack on each pipe. That's a cheap way to quiet it down - and not sound bad.
 
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Old Jan 12, 2009 | 12:21 AM
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From: Carmi il
i had the 70 series flowmaster and it was way to quiet just barely more sound than stock
 
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Old Jan 12, 2009 | 08:09 AM
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From: Almost Heaven
Originally Posted by 96 300
i had the 70 series flowmaster and it was way to quiet just barely more sound than stock
That is what I would think. The 300 is quiet compared to V8's (minus two cyilnders, remember). I heard a 300 with stoc k cats and a Flowmaster 40, dual out pipes ran all the way back. The best way I know to describe it is that it sounded like the stock exhaust system on a V8. It sounded good, it just wasn't loud.

Since the OP doesn't have cats, I would say try the 40 / 44 / or 50 series (the 50 series is quieter).
 
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