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Discussion Starter #1 (Edited)
Anyone running the Magnaflow high flow cats for the 392 (part no. 16420)?

Do they change the exhaust note?
Any check engine lights?
Will I need to tune after install (I have a Trinity)?
Any performance gain or loss after install?
Fitment? Will be bolting them up to a Flowmaster American Thunder kit.

Thanks everyone!
 

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Discussion Starter #2
Nobody running these pipes?

Ok let me ask this...what mid pipes are you guys usings? Or are mid pipes a wasted with these cars?
 

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From my research, hi flow cats don't yield much difference than stock cats.

Catless mids are a different story, much louder and of course less restrictive exhaust flow. I was able to go catless on my 5.7 and not throw any codes by installing anitfoulers.
 

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I ran them for a while. I have had Stock SRT Mids, Magnaflow Mids, and JBA Mids. I have had a Custom tune even before I supercharged so not sure about engine light. Get a tune if you are going this route.
 
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