Hello guys! I own a 2003 Silverado Extended cab short bed with the 5.3 . I bought it new, and recently decided to give it more power. Currently, it has a K&N FIPK, Hypertech Programmer, Borla Cat-back, and Taylor wires. I'm putting some NGK iridium's in this weekend. My next thoughts were to tune with HP Tuners (since I don't think the Hypertech did much), put a 180 degree thermostat, and an ASP underdrive pulley, along with taking the cats off and putting straight pipes. Those should increase the power, and it will be louder with no cats. Anyway, where do I go from there? I have another car that I've been putting my money into, so I don't want this to turn into another project. I just wanted to make it a little faster than where it's at now. So, what are good "bang for the buck" mods from this point? Thanks in advance for any help.