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  #1  
Old 12-21-2011, 12:09 PM
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Default Exhaust help

Hello everybody Im thinking about adding a exhaust to my truck and i heard that if I add a exhaust I will lose HP because Dodge come preset in so many words they come wide open already and if I change that I will lose HP R do I have anything to worry about.

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Old 12-21-2011, 12:14 PM
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Depending on what you do you will or won't lose power. Most of the exhaust is very free flowing, but the restrictive parts are the exhaust manifolds, the y pipe, and the muffler. Most people do a muffler swap and some do a y pipe swap as well. Some do headers but they are expensive and sometimes cause other problems. I would recommend swapping out the stock muffler to a straight through type like a magnaflow, then also maybe swapping to a good y pipe (magnaflow also has one).
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Old 12-21-2011, 12:18 PM
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I was thinking about flow master I dont want nothing to loud where i would hear it inside the truck i just want it to sound a little bit deeper
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Old 12-21-2011, 12:24 PM
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IMO flowmasters are not a good choice. They use a chambered design that is not free flowing. Yes it flows better than stock, but not as good as you could get for the same money. There are several companies that make straight through mufflers: Magnaflow, dynamax, borla, etc...

Flowmasters are often loud in the cab (drone) also from what I've read on the forum. You can go with a longer magnaflow or other straight through type and it shouldn't be too loud. I'd recommend an 18" or longer for you. Many go with the 14" and they are too loud for their taste. If you leave your stock resonators on also (near the tailpipe) it will help keep the drone noise under control too.
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Old 12-21-2011, 12:25 PM
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From my experience, straight through mufflers are actually pretty quiet at low rpms/low throttle, then loud when you step on the gas hard. IMO that's the best of both worlds. Many people say at idle it hardly sounds louder than stock, but it sounds "meaner".
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Old 12-21-2011, 01:10 PM
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Thanks do you think it will give me more HP
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Old 12-21-2011, 01:12 PM
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also do you know what models are good for the dodges are for what im looking for
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Old 12-21-2011, 01:27 PM
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HP gain will be minimul at best, the only time you will see great increases is if you do the exhaust with a CAI, Programmer and maybe a throttle body. I can tell you now that you will hear the 18" magnaflow in the cab at any RPM other then completly off the gas and you will hear drone and you will hear a difference in sound when the MDS kicks in. I just took out my 18" and put the stock one back on and yep, I have the stock resonators on both pipes. Some say the bigger magnaflow is much more quite but they said the same about the 18" but I'm not going to spend the money to find out just yet, maybe I'm getting too old lol.

If your running a single exhust then everything I said may not apply as I have the Longhorn that has a cat back system where one pipe goes into the muffler and then comes out as two pipes.
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Old 12-21-2011, 01:40 PM
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It will add some power, maybe 5 to 10 hp at best probably without other mods. Like scooter said when you do mods in combination you get more from them. The 18" is only slightly bigger than the 14", they also have longer mufflers that are even quieter. I think the biggest is a 30" or so, I would bet money that one is quieter than stock at idle and low rpm/low throttle. If you really don't want to hear it then get the longest muffler you can.
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Old 12-21-2011, 08:56 PM
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You will not get 5 to 10 hp increase with a muffler change.
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