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Message: [QUOTE="f100cleveland, post: 1389298, member: 22705"] I had the 17" x 5" on my 06 Dodge that was straight piped. Couldn't stand the drone and put that on and it took the rasp and drone out, but still let you hear the exhaust outside. I then went twin turbos and took it off cuz it was whisper quiet. Dad then put it on his straight piped and fully ******d 6.0 with a powermax turbo. That thing I think droned worse than the Dodge did. Took ALL of the interior drone out but still really barks when the go peddle is mashed. Now that I have the 6.7 and its straight piped with the ATS Aurora 4000 turbo, I am debating on putting one on again. Its not bad, just spoiled after buying the truck bone stock and modding it as I go. Does the 4" vs 5" full exhaust system sound a lot different on the 6.7's? I was thinking maybe do the cat back 5" and keep the stock section of downpipe to help spool the turbo quicker. [/QUOTE]

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