Originally Posted by TC@HP2
Everything I've found says the 17747 Dynomax is a 2.25 tube muffler. Is this truly what you are after because most replies in this thread are speaking to 2.5 or 3 inch diameters?

Some things people in here have stated and I think most of us would agree to - 2.5 and 3 inch tailpipes will increase the sound. Straighter thru mufflers will increase the sound. Higher compression ratios will increase the sound. More cubic inches will increase the sound.

Since your engine is built, you can't alter the displacement or comp ratio. That leaves exhaust system as the only mods. A change to 3" tail pipes could give you the extra sound you want. If you don't want to change your pipes, then put a more straight through or free flowing muffler on it. Super Turbo and Ultra flow both achieve that. IMO ,the reproduction system was designed to match factory specs which wanted to meet a certain NVH requirement that the factory set at the time. Anything that flows better will be louder, only question is how much so. Despite what the sound clips are putting out there, I'd venture the extra turns inside a Super Turbo will be quieter than the straight through Ultra Flow. If you are afraid of it being too quiet, you can go Ultra Flow. If its too loud, then add resonators.

These places both have big block sound clips on similar cars that might be more accurate than the Dynomax site and might be able to help you find what you want:
https://www.gardnerexhaust.com/sound-clips/
https://www.accurateltd.com/B-Body-Mufflers-_p_192.html


Correct the 2.25 is what I need / want. My exhaust is in excellent shape so In not changing pipes . I just want a little more rumble.

Ive looked at the Accurate hemi HP mufflers and their standard hemi mufflers . But at almost $500 for a pair.
Im looking for less expensive alternatives

Keeping it 100% OE stock appearing isnt top of my priority list