Yours being a 6.0 I would leave it alone, It is already pretty loud, without cats it will probably be pretty raspy. I think it sounds good like it is.

 

I have dynomax bullets on my 95 and love, or did love them. They have a very deep aggressive tone but at low throttle they sound similar to say a flowchoker super 40 series. They are pretty loud though. My dad claims he can hear me when I start mine from the parents house to our shop which is about 2 miles as the crow flies and thats threw a small town too. Honestly they aren't loud at all in the cab and I have 2 1/2 duals and no cats. The only problem is over the last 6 months or so they have started to make a chirping noise, my power and gas mileage has gone down and the engine is leaking like a siv. I found a thread from back in 05 around the time I got mine that a guy with bullets actually had the inner core collapse and really block off the flow which I'm sure is what mine is doing. For the price though you can't go wrong and this seems to only be in a few select cases of the core collapsing around the 2005 year or so. I plan on cutting mine out and taking my x pipe i'm no longer using and making a 2 1/2 to 4 inch y and putting a single 4 inch bullet in place. Should flow good and scavenge even better, probably be quieter and take what little pop I had out of the equation.

 

where is the best place to buy the loudmouth mufflers at? i have a hard time finding slp's mufflers online

 

ebay.LOL.

 

Summit sells them too.

 

I've never heard of this rasp everyone talks about. Maybe I just don't know what I'm listening for. No cats is a lot louder than cats. I'm not impressed with my 22" magnaflow; it sounds like crap. All it does is drone.

 

Last I checked they only had the loudmouth IIs, not the I's. They may have them now though.