Hey Guys, this is my first post on AZ. I have a 2005 RL I got about a year ago and so far I have a Cosmo Racing CAI and two of the four resonators deleted and also replaced the stock mufflers with Magnaflow 14829 after hearing a YouTube video of it with those mufflers (I also have done some electronics mods like a 2 way remote start/alarm and subwoofers that I will post on a different thread I guess?). I must say I'm pretty happy with the results. It sounds good when accelerating but pretty quiet when cruising. I have noticed that it is loud at around 2k rpm. As soon as you're over 2k rpm it gets quiet almost instantly. I have a few videos of both the resonator delete with stock and magna flow mufflers. Let me know if you guys want to hear it, I'll upload them to YouTube and post a link. The attached pictures are of the Magnaflows and straight 2.5" pipe all the way to the first two resonators.