Agreed. That said, Aero Turbines are about the best muffler you can buy, I highly recommend them.

 

I saw no mileage increase with a muffler swap. A tune,CAI and muffler I could see some increase. I did with my 1998 1500. Maybe 2mpg increase. But that 1998 had a restrictive exhaust. It had a restrictive intake. A little more timing helped it. But the 4th gens don't have those issues. Have read where exhaust flows pretty good as is. That the intake flows really good as is. My 4th Gen has easily 100 horse on my 318 at its best. It also gets 6 mpg better at 70 then my 2nd gen ever did.

 

On my 2004 Ram Quad cab hemi, I did notice an increase in mileage of approx. 2 mpg. But I did drive that truck like it had egg shells under the gas pedal. With that muffler, it is hard not to step on the gas, because the muffler sounds really good.

I did not put one on my 2009 Crew cab simply because I just never got around to doing it.

Bob

 

I love my AT3030 sounds great with mellow tone and a kick *** growl when you hit the gas.

 

no affense, but if you could get 1-2 more mpgs of just a new exhaust, dont you think they would have done that from the factory? then advertised that the ram gets better mpgs than any other truck?

they have engineers work on this year round trying to figure out the best configurations, now when it comes to the cats.... thats where id like to know if a high flow cat will make a difference. because the exhaust could be as free flowing as it can get until you get all environmental and then you have to throw the cat on, and there goes your power

 

Someone finally hit the nail on the head.
Most restrictive part of an exhaust system is the cats.
In most modern vehicles being built today, mufflers have quite a bit of engineering in them so they are significantly less restrictive than even 5 years ago in attempt to improve mileage. This is why were not experiencing the big HP gains with CAI's and muffler mods we were so used to 10 years ago.
If you’re looking for a MPG/HP increase, start with the cats. Because of their function and at today’s technology, they will always be more restrictive than a muffler.

But also be forewarned, that significantly lowering the backpressure your engine experiences from the exhaust doesn't necessarily increase your power, but just change your dynamics of the engine's power. Yes, it may give you more HP, but may do it at the expense of mid-range torque. For some, this may not be ideal.

 

People buy horsepower, but they drive torque.

 

I am the OP and I had the 3030xl installed on my GMC Sierra, I am the most skeptical perfson in the world and did not believe it but the muffler helped, I was avg around 16.5-16.8 stock and now I am steady between 18.0-18.5. No **** many tanks run through, it use to shift gears around 2100rpms when accelorating now its around 1800.

 

My favorite saying is HP sells cars, torque wins races.