Upower 4" Inlet Diesel Exhaust Muffler 7" x 24" Body 30" Whole Length XS2772 - Straight Through Stainless Steel Welded On Resonator Muffler

This works depressingly well for the price. I put depressingly because I miss the deep loud sound of my 22 L5P. With that being said, it works great! No more drone from my 4" exhaust when pulling our trailers or cruising on the highway. You can still hear the exhaust and the turbo whistle, but it controls the drone and the whistle. The metal is thick enough to weld it on perfectly and the muffler looks good in place.

Cheap, effective and seems to be durable. Been on the truck over a month or so now and it doesn't have any noticable corrosion. It really quieted down the exhaust, that being said it still makes a little bit of noise. Install was super easy with some stainless clamps I purchased separately. Over all I would highly recommend for anybody looking to quiet down there truck .

Muffler seems to be of quality and the welds are clean. I replaced my original muffler from my MBRP 4 inch from the turbo back system that rotted out, it's a touch quieter which I don't mind and actually enjoy. Throttle response and deacceleration is exactly the same as it was before Just a little quieter.

I have a 6.0 Powerstroke Excursion that came with a straight 4-inch exhaust. At over 40 years of age, the sound was just too much for me. Luckily, I was able to remove an old section and slip this one on—installation was incredibly easy. The difference is night and day! Now the engine makes all the noise, with just a muffled exhaust and faint turbo whistle. Exactly what I was looking for. Like my vehicle a bit more now.

Seems quality : came with a clear coat of some kind on it. On my 6.7 deleted truck it's not doing much for low frequencies. Truck is quiet but boomey. Not much drone but not eliminated either. Good for the price but don't expect miracles here : it's just a straight through muffler.

This is a great muffler. I've only been using it for four months, but it is great. It kills all exhaust noise from my gen 2 12 valve except for the turbo. All you hear is the turbo whistle from the exhaust. Amazing muffler.

Great product great price really quoted down my 6.7 Cummins. Little to any drone and truck is deleted .

Works good on a 6.7 cummins to quiet it down but still has a good loud rumble and turbo whistle to it.