Found an awesome DRONE-FREE muffler!

[boiler71]

Prior to adding the Lightning supercharger to our Expy (really my wife's Expy), we upgraded the exhaust in preparation. I was running a Magnaflow dual-in/dual-out (DI/DO) muffler on my F150 and it was great...so we added the same muffler to the Expy. While the performance from the Magnaflow was great, the drone inside was terrible. We ran that setup for a few months even after we added the suercharger, but the drone was too much.

After many phone calls to various companies, we swapped the Magnaflow out for the largest Flowmaster DI/DO unit available. While the drone was less this time, it still drove us nuts.

We even installed a Gibson DI/DO muffler with the same results.

Our saving grace came when I found the DynoMax VT muffler. (http://www.dynomax.com/mufflers.php?muffler=vt) They claimed the muffler was drone free and offered a 90 day return if I wasn't satisfied. The muffler has a flap in the outlet pipe that increases back pressure slightly under cruise condition but opens up under acceleration.

We installed the mufflers and all our drone vanished. Needless to say, my wife was VERY happy. And when the wife is happy, everyone is happy.

Give the DynoMax guys a try. With a 90 day money back guarantee, you can't go wrong.

 

[jacks3am]

LOL I knew you would say the v/t muffler I saw it on power block last weekend, and they are top notch, and drone free I like dynomax

 

[BakerEdition]

dont mean to sound stupid...but what is a drone? Never mind...went to the website...DUHHH....

 

[sgtowing]

dont mean to sound stupid...but what is a drone?

It's the resonating you get back inside the truck when it's running. It sounds like a dull humm.

 

[joecrotch]

yes, I am all over this!

 

[Big Red Monster]

i dont understand why everyone hates that drone, that was one of the reasons i put my 40 series flowmasters on my truck I wanted that loud drone lol

 

[99 Expy]

i dont understand why everyone hates that drone, that was one of the reasons i put my 40 series flowmasters on my truck I wanted that loud drone lol

Or no mufflers like me lol, but someday, I will probably be nagged enough to get rid of the noise. I will have to look into them if the need arises.

 

[GAINMOB]

i love the drone

 

[SOLISIMO]

But how does it sound outside?

 

[Stoned06]

But how does it sound outside?

+2. Would like to hear it.

 

[SOLISIMO]

The reason I ask is bc my daughter is 15 months now and is very smart. When I accelerate she starts humming to the exhaust drone untill it shifts. All the tvs in the truck and this is what she does

 

[jacks3am]

it gets loud when you get on it, just like a run of the mill flowmaster or somthing, but when your cruising it muffles the noise

 

[SOLISIMO]

Thanks bro

 

[Kevo]

we put one of these on my brothers 99 cherokee 4.0 and man night and day difference no more of that monotone straight 6 drone sounds way better then any other jeep

 

[boiler71]

it gets loud when you get on it, just like a run of the mill flowmaster or somthing, but when your cruising it muffles the noise

My apologies Guys for not responding to this sooner. For some reason I didn't get any of the email notifcations for this.

With that out of the way, Jacks3am is exactly right. When we mash the GO-pedal, it is every bit as loud as the Magnaflow or Flowmaster that we had on there previously. However, when cruising in normal city traffic or on the Interstate, it has a really nice, very low tone. Put it this way, it passes the Wife-test. Cass couldn't be more happy with these mufflers.