2004 Ext. Cab 4.8L = K&N CAI + Jet Performance MAF + PowerAid TB Spacer + MSD 8.5MM Plug Wires + JBA Stainless Steel Shorty Headers + Magnaflow HighFlow CATs + Jegs 2.5IN Exhaust Cutouts + Magnaflow Tru-X Pipe + SLP Loudmouth Resonators + GM Corvette Servo + GM Corvette Valve Body + SS Silverado Aluminum Driveshaft + GMPP 3.73 Gears