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3" single vs 3" dual

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Old 05-10-2010, 06:41 AM
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I recently went from a 3" straight through to an Invidia 70mm Twin with a custom mid muffler.

It has gone from a very tiring drive to something that is very comfortable on the ears. Not sure if I've lost any power but it's not noticeable if I have.
Old 05-10-2010, 07:06 AM
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I have the dual Ultimate Racing setup, and I lost no HP going from Inline Pro single. Then again the UR setup is ridiculously good quality, so I won't say all dual setups are equal.

On a side note, I gave my IP single setup and a friend put it on a non turbo AP2. GROSSSSS! So loud and ricey.
Old 05-10-2010, 07:11 AM
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Spec opps switched from a invida v3 to the inline pro single as did I. They are equally as loud fyi. I added a 3" magna flow cat which helped and I lost no power at all. I gained around 15 HP maybe more adding the single, I think that was similar to specs opps gains. The invida v3 flows very well for a dual so making even more power buy adding it I was very happy. I do however understand it can be kinda loud over long trips. You will probably give up some power, but I'm not sure you will notice 15 hp or so. Just turn the boost up 1 psi!
Old 05-10-2010, 11:17 AM
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The biggest things for me was my turbo spooled a bit slower from the switch the hp you can't really tell a difference at 500+
Old 05-10-2010, 07:02 PM
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Originally Posted by Revenge,May 10 2010, 09:11 AM
Spec opps switched from a invida v3 to the inline pro single as did I. They are equally as loud fyi. I added a 3" magna flow cat which helped and I lost no power at all. I gained around 15 HP maybe more adding the single, I think that was similar to specs opps gains. The invida v3 flows very well for a dual so making even more power buy adding it I was very happy. I do however understand it can be kinda loud over long trips. You will probably give up some power, but I'm not sure you will notice 15 hp or so. Just turn the boost up 1 psi!
I'm pretty sure i saw a thread stating he had a 2.5" invidia v2.

You installed a high flow cat and didn't lose any power? is that even possible?? which one did you get? I'd like to get one too. OR should I just get a 3rd muffler inline?
Old 05-10-2010, 08:20 PM
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The exhaust is 3" all the way back, not 3" to 2.5". And yes, they're Magnaflow "Straight-through" mufflers.

Old 05-11-2010, 04:13 AM
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Originally Posted by EK9MAX,May 10 2010, 11:02 PM
I'm pretty sure i saw a thread stating he had a 2.5" invidia v2.

You installed a high flow cat and didn't lose any power? is that even possible?? which one did you get? I'd like to get one too. OR should I just get a 3rd muffler inline?
Maybe he had an invidia v2, I just know he had an invidia. The shop welded in a 3" magnaflow cat into my inline pro exhaust. I don't think adding a good HFC is gonna make of ton of differnce. My car dyno'ed 400hp, then I added AEM, made a intake for the turbo and added a HFC and got 413. So it was a bit colder and I went from a emanage to a AEM. There are so many factors I don't think however the cat added to any power loss. However during the first tuning session the car made more HP when we switched exhausts from the v3 to the inline pro 3".
Old 05-19-2010, 04:38 AM
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Decided to go with a Asura 3". Any input compared to the ILP?
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