Diamond Eye 460033 Muffler

i had BADdd loud drone issues with my flow pro 30in muffler perforated no fiberglass insulation. I did alot of research and called vearse companies and the engineer at diamond eye told me i should get this one its the quites flow through muffler. after installation of the muffler and a 30" FTE resonater it was OMG amazing my 4in exhaust 7.3 sounds like factory and my EGTs are lower then before by 250°. make sure the opened luvers are towards the engine.

Installed on a 1999 Cummins ISC 350 in a diesel pusher. Had a new factory original muffler on and was reaching almost 1400 degrees measured in the exhaust manifold. After replacing with this muffler the highest I’ve seen is 1260. That’s 100 degrees cooler. But that is the highest. I would say overall the engine runs 150-200 degrees cooler.The sound is not noticeable. Very impressed with the sound deadening, as I was worried about being loud in an rv park. I installed with the exhaust flowing over the “clam shells”. Lots of opinions Online on what way to face the air direction. Would buy again in a heartbeat! Great price and seems solid.

I will have to say that this muffler made a major difference in the sound if the truck. It eliminated all if the high pitch noise from the turbo vanes at idle and the high boost when you are mashing the peddle. My truck used to have a drone in the cab while pulling a trailer. That is gone now. Now all I have is a deep rich tone of the engine.

I bought the same muffler for 56 dollars! This is not stainless steel they lie! My friend who works with all sorts of metals tested it yesterday. Complete false advertising. Not to mention the description and pictures differ from actual product you receive. The internals are basic . Not the spiral internal clam shell design. DO NOT BUY! WORKS THE SAME AS A CHEAPER ONE. I bought because I thought it may be better then what I had and the looks aswell. What a waste of money. And the shipping! Let's just say the muffler and tape is what basically showed up , there was a completely destroyed box though . I thought it was trash that blew on to my steps

This upgrade made a significant reduction especially at highway speeds. The droning and high pitch whine is gone. Not as quiet as I was hoping for but still very good overall.

Appears well made and is heavy gauge, weighing almost 23#. It is not a polished finish as in the picture, but should be referred to as "natural" or mill finiish incthe product details. Due to the finish I returned it and ordered an Eero 4040XL, at a 25 percent higher cost, but will have a muffler that matches the rest of the polished components.

Great muffler, quality welded on both sides.Put this on my turbo, cammed 5.3 running a 4" straight pipe duramax exhaust. It went from crazy loud to a nice rumble but loud only at WOT which was what I was looking for.

Very pleased with the sound reduction of this muffler. After a delete and straight pipe the sound was too loud for my preference. This muffler has now made the cabin quite acceptable. Not as quiet as stock.