
Welcome to the site, wytlytn

Congrats on the new SERG. All CVO's have cats so just slip ons will not help much. The cat is very restrictive. New Header Pipes from V&H: $519.95 Monster Ovals $500 plus...... Install $$$
On the other hand: Fullsac cores: $109 (w/ CVO discount). McGills core bit: $26. Hanging out with a buddy, drilling out the cat, grinding out the stock cores and installing Fullsacs: Priceless!! (Less cost of a couple of beers). There are great instructions posted here. Result: Great sound (not too loud but very deep sound), more responsive and cooler engine. Seems like the best bet, esp. in locations where they enforce the exhaust regs. like here in CA. Personally, I think the Stock head pipes and mufflers are beautiful. It's subjective but most aftermarket pipes are smaller and don't look right, esp. from behind. If you don't want to drill, there are Stock head pipes available on e bay and other places but don't get them from CA (with cat). It's not really hard to do if you read the directions posted by Jim Kerr.
Add the SERT & Heavy Breather: Dynojet numbers: 89.07 hp and 109.22 torque. Whole different experience!