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Bolt-on Tech: 4G63 intake, exhaust, intake manifold, ignition, fuel system, cooling, etc.

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Old 02-20-2006, 04:02 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #1 (permalink)
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2G-specific

Gut Out Muffler?


I have the Greddy Evo II exhaust w/ a test pipe and the other day when i looked in my muffler i seen these little wire strings coming up so i started pulling them out. I guess its some kinda sound deadener. Im trying to make my exhaust flow a little better so im wondering if anyone ever hollowed out a muffler? I dont have a cat so im guessing this will improve exhaust flow a little bit more. Is this possible?

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Old 02-20-2006, 04:04 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #2 (permalink)
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You would be removing the muffler basically because a hollowed out muffler is just a big straight pipe. THe sound would increase dramatically, and would echo off the muffler walls so I dont know if thats what you are aiming for.

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Old 02-20-2006, 04:16 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #3 (permalink)
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im aiming to get a little more flow, and i love the way the srt-4 sounds
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Old 02-20-2006, 04:35 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #4 (permalink)
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If you are talking about removing the packing, don't do it. It will get louder but flow will actually decrease, because the airflow will be going in & out of all those little holes, creating turbulance and killing velocity. Maybe just run a straight pipe, hard to outflow that.


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Old 02-20-2006, 04:59 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #5 (permalink)
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If you are looking for more exhaust flow, pick yourself up a downpipe/midpipe setup to compliment your catback and testpipe. If you wanted to gut out a muffler, why didnt you buy a cheap-o ebay unit and hack it to bits? The EVO exhaust sounds nice and I would hate to compromise its sound for such limited gains.


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Old 02-20-2006, 05:13 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #6 (permalink)
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SRT4 utilizes resonators and no mufflers to achieve its sound. Also, the exhaust is about a foot and half shorter since their engine is mounted intake side towards the front. I am going to try to make my own exhaust this summer and try to get as close to the SRT4 exhaust as possible and I will write a guide about it.

My plans so far are 3" downpipe, 3" flex, 3" cat, then split to 2 1.75" runners down both sides of the vehicle, and put a resonator or 2 on each side. Of course, this probably wont clear the ground, or have some other kind of problems, but its just in testing right now.

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Old 02-20-2006, 08:14 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #7 (permalink)
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If you like the sound of the SRT4,just pull the entire exhaust off one and weld it up to your car.I utilized a used exhaust system off a F350 for the mandrel 3.5" bends for my down pipe and rear underaxle bend.Don't be guttin no mufflers!
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