muffler advice, please
 

Is the million miles on my tractor reason enough to change the muffler?

If so, should I pay $55 for stock or $135 for a Megaflow. Or, is there something better.

TIA

C'mon, maaannnn!? Don't make me go hang out on CDLofit! :p

I wouldn't change it until it was needed. It's not something that will leave you stranded on the side of the road and won't do any further damage when it does begin to fail.

If it's not broke, why fix it?

Fuel economy, carbon build up and a flow through design that reduces the back pressure. I'm just wondering if anyone can say their mpg jumped a little bit by changing it.

This is all they do Kevin Rutherford's website. I just like it better over here than there. His server or whatever is irritatingly slow and I'm not ready to forgive him for endorsing the Turbo 3000. :mad:

I'd definitely change it. And buy the best i could afford....

I'm hearing things like $400-$500 for a Grand Rock. I'll settle for 'better than stock'.

How's that painting going, Solo? Hey, if I send you some nude pictures of me, do you think you can make me an oil painting?

The stock OEM mufflers are not that great from the git go anyway. At a million miles, you probably are have enough junk in it that it is restrictive. The Grand Rock is pretty good, but a little on the pricey side. Pittsburgh Power offers a low restriction muffler for a lot less. I have side stacks and I removed the along frame muffler and put in new pipe and a low restriction resonator in place of it. It helped somewhat in mpg and performance. Sounds better too!

Yeah, that's what I was looking for, thanks. I particularly want to make those improvements that will pay for themselves and then some. I could have on shipped from PP. I wonder about that Walker (Megaflow), I can pick it up at Truck Pro and it would cost just a little less. Without any other advice, perhaps PP is the way to go.

Backpressure is only an issue if it's excessive. The OEM muffler could be restrictive, depending on the make model and year of truck; backpressure IS measureable.

...I wouldn't expect the claims made by the turbo 3000 people to show up in your flow-thru exhaust upgrade.