Ask a Flowmaster Tech: the Exhaust Q&A.

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Jun 11, 2020 | 09:16 AM

#11

mikepledger

Registered User

Joined: Jun 2020

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American Thunder exhaust for 2019 Sierra 1500 5.3

Quote:

Originally Posted by Mike@Flowmaster

We're here to answer any question that you may have about exhaust systems. If you have a question or concern about a Flowmaster product, need help choosing a specific muffler or building a custom system, this is the place to post. Ask away!

I am looking at putting the American Thunder cat back exhaust onto my 2019 Sierra 1500 5.3 V8. I was wondering what happens to the sound/drone of the exhaust without the flapper valve when the engine goes into cylinder deactivation mode. Would this be excessive? Thanks Mike

Jun 11, 2020 | 07:31 PM

#12

1FastBrick

Custm2500's Rude Friend

iTrader: (17)

Joined: Apr 2007

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From: JunkYard

Quote:

Originally Posted by mikepledger

They no longer sponsor the forum and the account hasn't been active since 2016. I would recommend you reach out directly if you want more info on there products.