2004-2007 Cadillac CTS-V Performance Mods Discussion, My experience with removing the resonator in Cadillac CTS-V Series Forum - 2004 - 2007; My 2006 V has a decent cam, OBX headers, no cats and a muffler delete. So it did have the ...
My 2006 V has a decent cam, OBX headers, no cats and a muffler delete. So it did have the factory resonator and sounded great. I was totally happy with the sound, but a couple of weeks ago the resonator started breaking up inside and rattling like there was no tomorrow. Without a cost effective replacement, I decided to try replacing it with a Magnaflow x-pipe followed by a pair of 12" dynomax bullet mufflers. That combination was about the same length as the factory resonator and went in with ease.
The moment I started it up my heart sunk. It sounded like a cross between a straight piped Honda and a race car. It was even worse when I got it out on to the road and the droning was horrible. I parked it, took some measurements and ordered a pair of stainless ebay mufflers. I didn't even drive it again until the new mufflers arrived.
Well I put them on tonight and all is well again. I think it is a bit quieter than with just a resonator, but it sounds plenty healthy. For a $152 pair of mufflers these things worked like magic. They fit well and have nice tips. My recommendation is to stick with the resonator, but if you need mufflers these do the trick nicely.
I have a cam, Kooks 1-7/8 longtubes, non-catted mids, corsa exhaust with corsa h-resonator. I had to run it without the resonator for a while after the longtubes were installed and it sounded like a stock car. I was worried it wouldnt quiet down much, but after I had the resonator reinstalled it was perfect. Nice rumble at idle and cruise, no drone, and is loud as S#!T at WOT! All in all the resonator helps way more than I had expected.