Exhaust Bypass

Incredible78 · Dec 5, 2016

On the 4th Gen. 5.7 does anyone have a exhaust bypass installed and how well does it work with the cylinder deactivation? I have my MDS shut off and am just looking for some more Hemi Rumble without buying CAT back system. I'm curious for those that have a Bypass and how the sound is when the MDS activates. With the exhaust system tuned for MDS I'm looking to make sure I don't have any problems if I install a Bypass and reactivate the MDS.

Kotta390 · Dec 5, 2016

What is an exhaust bypass?

Ram Man · Dec 5, 2016

another term would be cutout

Kotta390 · Dec 5, 2016

Ram Man said:
another term would be cutout

Wow, never in my life have I heard of someone calling a cut-out an exhaust bypass. The terminology now makes more sense.

Kotta390 · Dec 5, 2016

Incredible78 said:
On the 4th Gen. 5.7 does anyone have a exhaust bypass installed and how well does it work with the cylinder deactivation? I have my MDS shut off and am just looking for some more Hemi Rumble without buying CAT back system. I'm curious for those that have a Bypass and how the sound is when the MDS activates. With the exhaust system tuned for MDS I'm looking to make sure I don't have any problems if I install a Bypass and reactivate the MDS.

The cut-out or what you are referring to as an exhaust bypass will create a TON of drone when MDS kicks on. It will be pretty bad and without the MDS on, the drone may still be bad.

charonblk07 · Dec 5, 2016

It sounds alright in 4cyl mode but definitely not the same as the throaty growl you want from a v8. I have always deactivated my MDS anyways because I hate the MDS transition and while I did see fuel economy increases with it in my '07 it was disabled day 1 on my '09.

Kotta390 said:
Wow, never in my life have I heard of someone calling a cut-out an exhaust bypass. The terminology now makes more sense.

Better term would be muffler bypass vs exhaust bypass, but that's po-ta-to, pot-ato.

Kotta390 · Dec 5, 2016

charonblk07 said:
It sounds alright in 4cyl mode but definitely not the same as the throaty growl you want from a v8. I have always deactivated my MDS anyways because I hate the MDS transition and while I did see fuel economy increases with it in my '07 it was disabled day 1 on my '09.

Better term would be muffler bypass vs exhaust bypass, but that's po-ta-to, pot-ato.

Again, never heard of that term lol. Its sad to say how long I have been around the automotive world and have never heard of anyone use these terms. Learn something new everyday. :favorites13:

jag1886 · Dec 5, 2016

I researched these for a while and the only real problem I found was they all leak and makes your vehicle sound like it's got an exhaust leak when closed, unless you are talking about one you have to crawl under the truck and uncap. I would imagine that the MDS would sound like crap with the cut out open.

Exhaust Bypass

Incredible78

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Kotta390

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Ram Man

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Kotta390

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Kotta390

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charonblk07

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Kotta390

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jag1886

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