Replacement muffler for a flowmaster catback system

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Jul 31, 2005 | 09:16 PM

jim0517

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Replacement muffler for a flowmaster catback system

I'm looking to replace the series 70 muffler that came with the flowmaster catback system for my 99 5.4l Super Duty. While the exhaust sounds nice outside, I'm sick of the noise while cruising on the highway.

Any recommendations for a quieter muffler? Or a way to reduce the noise in the cab?

Jul 31, 2005 | 09:21 PM

xtrford

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I would go back to the stock muffler if the 70 series is too loud. I thought my 50 series was nice for interior noises on my 5.4l f150.

Feb 16, 2006 | 06:58 PM

flexybronc

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Maybe edelbroch rpm mufflers, or hooker aeuro chambers. not pingy and stuff like flowmasters. More torwards the rpm but will be louder out the tail pipe.

Feb 16, 2006 | 07:08 PM

Cuda444

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From: People's republic of MA

I love my magnaflow... nice non-stock rumble outside -- no louder than stock inside, and what you do hear inside isn't that flowmaster drone you hear cruising down the highway.

Tom

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