I just put on a cb extreme and it is awesome. It's very aggressive outside but there is no drone and alot quiter inside rather than my dumped flowmaster 40 was. I would say Forget about the flowmaster and go with a cherry bomb I'm right there with hammer on the extreme.

 

You won't gain much from going true duals because one side will be longer than the other so it will be a bit unbalanced. Your best bet is to cut your Y-pipe at the restrictive Y where in goes into 3" pipe and get a good Magnaflow Y to weld in there, then go 3" back to the muffler of your choice. I prefer Magnaflow, but it won't be as loud as you want so I would suggest a Cherrybomb Extreme in a single 3" in/out with a turn down.

 

Actually the whole thing about backpressure and losing torque (it's low end torque that's "lost" not HP BTW) is very misunderstood. Backpressure is inefficiency, plain & simple. It's actually the gases backing up into the engine at the manifold because there is a restriction that doesn't allow the gases to escape fast enough. But the pressure it builds forces the engine to work harder to expel them, so the harder working engine at low rpms is felt as greater torque.
The better the exhausts flows, the more HP AND Torque is gained. The only problem here is that the HP & Torque curves move UP in the RPM band, so even though you have an INCREASE in torque, looking at the curve at a dyno you have less of it down low. Not so good for a heavy truck, especially a hauler or tow vehicle. Of course there are ways to have your cake and eat it too, but they are costly. Re-gearing to taller (numerically higher) gears will bring the low speed RPMs up more into that higher power band sooner and a cam specifically ground for low end performance will do it.
In stock form, you want a little bit of backpressure for that low end (it's the reason why my stock cats went back on two weeks after I installed my long tube headers). The stock cats are pretty high flowing compared to those of 15-20 years ago and I see no reason to remove them provided they are in proper working order. Also if you want that DEEP tone like the muscle cars of the late '60s like the original 426 Hemi, try a CB Extreme with long tube headers!


As for true duals, my grandfather and uncle were life-long mechanics and my old man and uncle worked at the local track on weekends, so even though I'm no mechanic by trade, I've been spoon fed this sh*t since I was a kid. My father taught me how to weld at 9 and I was doing exhaust at about 13 and he harped on me the importance of equalizing the pressure between the two sides, so I've never done a "TRUE" dual. I've had dual setups with two mufflers, but have always used an "H" or an "X" pipe to connect the two sides somewhere, usually just before the mufflers.

I've seen dynos with true duals and also single muffler setups with one tailpipe and a non-restrictive "Y" like the stainless Maggy one and to be honest, the difference was negligible.

Since sound is your preference here and not performance, do whichever you like, but I'd still stay away from a chambered muffler design (ie. Flowmaster). Even though gains are not important to you, why LOSE performance? For loud try the Cherry Bomb Extreme, they use the term "Disturbing the peace since 1968" for a reason. Mine exits into dual tips at the rear bumper (the least loudest setup) and it's still BIG TIME loud. I've heard a few first hand that side exit behind the rear tire and they are louder, I can only imagine what one would sound like dumped...

 

What would be a little more mild than the cherry bomb x-treme? I know that I will be putting in an x pipe now because I understand equalizing now. I will probably still go with a dual in dual out setup with it dumped before the rear axle which is exactly 32 inches. However which would be least restrictive? A Y-pipe going into a 1 in 1 out CB extreme or a x-pipe 2in 2 out cb extreme? Could one of you guys show me some sound clips of what yall have? I want to be loud and bossy but on the highway going 65 - 80mph I want it to be comfortable. I'll be doing the muffler install on Friday so I only have a few days!

If you were me, with a 2007 5.7L Hemi with 64k miles and did not want to spend over $200 on mufflers and equipment, what exactly would you do. Keep in mind I already have the resonators cut off and both cats are in place never been messed with, and I still want the truck dumped.

 

One more thing....lol. Is the Cherry Bomb Extreme going to be blatty and poppy at a high register? Or will it retain a nice meaty low tone. Also isn't the CB Extreme a chambered muffler? So far i'm talked into the CB but should I go 2 in 2 out cb or get a y pipe and do 2.5"in and 2.25 out? I'm scared because all i have ever done is flowmaster and it seems like half the dodge owners on here have flowmasters.

 

Okay diregaurd all of my other posts. I've finally figured it out. I'm going with the 50HD series dual in dual out. Since its made for hemi I think that's the best choice. Hammer I read where you had one at one time. I think pulling the boat and horse trailer this muffler would be way better than the cb extreme.

 

Mine droned pretty bad in the cab especially right at interstate speeds. I wasn't happy with it at all and when I went to remove it before it was three years old and saw how the top looked like swiss cheese, it sealed the deal for me.

Lots of threads over the years about the drone, especially with MDS engines.

But guys do have them and swear by them. Maybe you'll like it. Just don't come on and post about how bad the drone is, cause I'll give you a "told you so", LOL...


CB Extreme has no chambers, just a single wing plate. I can't say my truck pulls any better with the CB than it did with the FM50, but it's no worse and my mid-high end is a lot more responsive now. I uses to have a 20' bass boat w/175 HP which wasn't exactly light and I do pull a big Massey tractor & rough cutter on a 22' dual axle trailer to mow my little piece of farm property with a few times a year, weighs in at 7700# and I can't tell any difference pulling initially at low RPMs between the two. I will say there seems to be a little more "snap" or a quicker response when I go to pass someone now compared to before.

As for the sound, mine is very deep, but I've got a buddy with a CB Extreme on a 4.7 Ram and his does pop and crackle a bit. He loves the sound though. Me, not so much.

There is a vid on the forum of mine, little low quality as I recorded it with my phone, but it ain't terrible...

 

I have the 50 now dual in dual out with it dumped 32" with turn downs. It doesn't drone at all. Would the 50hd drone more than the 50 regular?

 

I dunno, but mine did and if you do a search you'll find a LOT of guys complain about it, not just from the HD but from most of them.

Like I said, I had one and hated it, but I'm just as much about performance as sound. The dyno didn't like it either.

I've found over the last few years it seems to be a "kiddie" muffler, all the young guys who really only care about the rumble get one. Most guys who build up their vehicles for performance are more knowledgeable and stay clear of them.

I've been associated with both muffler/exhaust shops and a couple of true performance centers thru the years and about EVERY muffler shop stocks them and pushes them and the performance shops don't touch them.

I honestly don't think they'd hurt you enough to notice on a mostly stock truck, but when you start getting into headers, heads, cams, ported TBs and such, they definitely become a hindrance, you'll only flow as good as your most restrictive component. That's why most guys ditch the stock "Y" adapter. To me, it's just counterproductive to open up the intake/exhaust system and then choke it down with a muffler that only flows about 350 CFM, which is about the same or a little worse than a stock Hemi muffler. Imo there are mufflers out their that sound just as good and maybe a little better that flow at 500 CFM or better...

I'm sure Flowmaster must hate me by now, and they are or at least were a site sponsor last I checked, but I ain't gonna go boasting no product that I've used and seen issues with for the almighty dollar, it just ain't in my makeup. These are just my observations and opinions. I won't say I'm right all the time, so take it for what it's worth...

 

Hammer, Thanks for all the information man just one more question. I'm going to put the muffler right under the passenger back seat and run turn downs. I have 32" pipe after the muffler turned down right now and there is no drone and no obnoxious noises however I would like it to rumble just a tad bit more. If I install the new 50HD with the exact same setup but run 20" turn downs instead of the long 32" that turns down right before the rear axle, do you think I will notice any differences? Thanks again for all of your help. I will probably go with a magnaflow later on down the line once I can afford a cam and a good set of headers but for now i'll make up the difference with a nice fake muffler