🚀 Flowmaster 15430 Outlaw Race Muffler 3.0: Unleash Ultimate Performance Review

This muffler really brings my 5.4 liter Gen 1 Expedition to life. What I particularly like is the muffler diameter as it sits right where I need it with plenty of ground clearance.

Arrived on time. I have been working with Flow for many years. it would be like my eighth thread owner. I had a Super 44 before, that sounded good too.

When installed on my 2020 Chevy Trail Boss it sounds really amazing. There is no rumble in the cabin. Sounds very aggressive on cold starts and when pressing the GAS! 💯 % satisfied with the purchase!

WAYYY TOO LOUD. 30 minutes after switching on, the police were called because of noise pollution. Not recommended for daily driving. Great roar in the cockpit and just unbearable. Sounds great on startup and at idle, but that's about it.

2010 f150 with 5.4 came out in front of the rear wheel. Sounds loud and aggressive, with a good noise level in the cabin. This is exactly what I wanted, recommend and will buy again for other vehicles.

I love this muffler I had an old Super 40 series muffler on my 2019 Silverado 5.3 before this muffler and it didn't sound as good as this muffler, it roars on startup and if you step on it with minimal cabin hum, you'll probably buy another one for a double tune! If you want sound, look no further.

I have a street pole setup and wanted something loud and that's what it is. Very little awkward on the inside, just a little quieter than open headers, but makes the sound passable. Quite expensive for what you get in my opinion, but the Flowmaster will always come at a premium. Well built and very high quality.