Single or true dual flows
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Junior User
Joined: Jul 2004
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Single or true dual flows
I own a 1995 F-250 with a 351. Right now I have a si/do 40 series muffler. It sounds good but I want more volume. I know some of you pros have the answer to this question. I have 1 catalytic converter. I was thinking of just hollowing it out. If I do this will the sound increase greatly? My alternate plan was to put true duals with 2 40 series flows on there. What will this sound like? Will they sound the same?
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This is EXACTLY what i want also lol I've been hearing that you have to get true duals done by a custom shop. If you gutted your cats, and put true duals on with 40 series flows it would sound AWSOME!
You only have 1 catalytic converter???
You only have 1 catalytic converter???
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Junior User
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I get the picture that the cat just deadens a **** load of sound. But the main question I want answered is whether or not true duals with 2 flows will sound better than a single with a gutted cat?
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Joined: Dec 2003
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From: hamden,CT
i have the same truck a 95 f 250 and yes they only have 1 cat but its a real big one.i also have a 40 series and its not very loud at all.id just gut the cat out its the cheapest way to make it loud,or just take it off.
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Ya, the cheap route would be to gut the cat or take it off. That would be loud. But if you did true duals with 40 series than it would sound better, but cost more. True duals would open up some hp and let the engine flow better (less back pressure). But you don't want the pipes too big. So if you went with true duals i'd do like 2 1/2 inch pipes. I'm guessing that if you did go with true duals then you'd run them with no cats right? Cause that would be insane.
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Junior User
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I do realize that I can save myself about $200-350 just by gutting my cat. Can anyone be more specific with the different tones that I will get from each of the ideas that I am talking about? True duals will be louder, lower, raspier??? Single with a gutted cat will sound lower???
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Joined: Oct 2005
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take ur cat off and leave it disconnected..u wont believe how loud and nice it sounds..i get so many complements and it scares the hell out of people..one quesstion..sometimes i put the cat back on, which is hollowed out..i saw on a site that hollowin it out makes it hesitate which i dont get at all and they said it can mess ur truck up. can anyone verify this?
