Needin some more mojo

Hi everybody, its been awhile since I was on here. I've got an 03 rcsb 4x4, with a Volant intake, Nelson tune, Pacesetter headers, no cats, and a super 40 Flowmaster muffler. My question now is where do I go from here? It seemed fast enough at first, but now it just isnt cutting it :lol: . Any advice would be greatly appreciated. Oh ya, at what point should I start replacing stuff so I dont break anything? I've seen plenty of buddies tear a rearend apart and I dont really wanna do that.

Thanks
Phil D.