🔥 Flowmaster 9525454 2.5 (D) In/2.5 (D) Super 40 Series Muffler: Ultimate Exhaust Performance Enhancer Review

This muffler has a nice deep throaty sound but is not overly loud. Switched from a Super 50. Sounds great on my 1998 Chevy K1500 from a 350!

Used this on my 04 GMC Sierra 2500HD 6.0L with 2.5" OD to 3" ID expansion pipes installed like a dream, a bit of welding and it sounds great and flows even better highly recommended

Great product! Put that on an 89 Toyota pickup with a Chevy 350 swap. Sounds average, nice low tone. Installation was easy, just make sure you have the correct clamps. If your inlets and outlets are designed for 2.5" pipe, make sure you choose a 3" pipe. 2.5 inch is the inside diameter, not the outside diameter.

Very disappointed. I'm a welder, I make silencers myself. If this product were made where I work, it would end up in the trash. I paid for a good product, this is poor workmanship. Spray everywhere. I have attached photos. Even though it's under my car when I unpack it, it should look really good. Never again.

In 2008 I installed two 40 series Glow Masters on my 03' F150 (4.6). I've spent a lot of money dropping one and rusting through the other, both this year. I decided I needed the same sound but with less cab resonance so I replaced two separate mufflers with this 2 in 2 and couldn't be happier with the sound and performance of this muffler on my pickup. It was also half the cost of the last joke.