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Exhaust 5.7 HEMI Exhaust Discussion


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  #1  
Old 06-27-2013, 12:29 PM
RoJoRam RoJoRam is offline
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Default Why not DI/DO muffler rather than Y-pipe?

I want to go ahead and apologize if this has alredy been covered but I see a lot of folks replacing their stock (crimped) y-pipe with the Magnaflow and then running the rest of their exhaust. Why not go ahead and get a DI/DO muffler (ie. Magnaflow 14468) and remove the Y-pipe all together?

The Magnaflow 14468 has an X-pipe built into it.

I'm just wondering so thanks for any replies/insights.
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Old 06-27-2013, 01:17 PM
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There is another post here somewhere with this same question, can't find it but I believe the answer was that the DI/DO would only provide a very small increase (only a couple HP, maybe) that you would never be able to feel. The DI/DO would also be a lot more expensive to have installed since you would have to replace almost all of your pipe.
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Old 06-28-2013, 11:17 AM
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Well I didn't find anything about power gains or anything but I did find a couple posts and pics about it.

Thanks
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Old 06-28-2013, 03:59 PM
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I'd like to see proof of more than a couple HP with Y pipe also. I don't think you'd have to replace much more pipe going with a DIDO muffler vs. Y pipe. In the end, the DIDO muffler may be cheaper than Y pipe + SIDO muffler. It all depends on the shop, Many find bargains. My shop wanted a fortune just to weld my muffler in. I don't dare ask the same place about Y pipe.
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Old 06-28-2013, 07:48 PM
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Performance-wise it's not a big difference between the 2 setups and installation won't be much different either, but it would depend on where you placed the muffler. If it's an x-pipe muffler, you'd want it a lot further forward in the exhaust track to take the best advantage of the scavenging effects. IF you put it in the stock location your exhaust gasses will have cooled quite a bit and you've lost a lot of the benefit of an x-pipe.
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