Quote:

Ultraflows can be fairly mellow at idle on milder motors without a lot of compression and especially without a lot of cam overlap. When you go big cubes, high compression and long duration they tend to get a bit louder.

I went with the Dynomax Hemi Mufflers because with big cubes, 12:1 and a big cam I felt the Ultraflows would be a "touch too much" for the neighborhood and town I live in. The Hemis are 3" all the way through and flow well, at least on par with the shorties. I believe the OEM style
Hemi's are 2 1/2 to 2 1/4 ID, but I believe Accurate may make a 3" internal.

Here's a sound clip with 3" dmax Hemis:

http://www.youtube.com/watch?v=jd8GeXYYkKU&feature=channel_page



those are the dynomax 17769's I presume? the large body ones? I have one in a big single config on my 5th ave with a dynomax race bullet in the tail and it's not bad.

if you are looking for a little quieter or don't need the 3" straight through, the 17748 & 49's are the 2.5" version.

adding the race bullet in my tail as a resonator made a big difference in knocking the noise level down, especially in the interior of the car.

1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)