Just joined the site. I'm looking into upgrading my 2003 ECSB 4.8l, 4x4, Z71. Right now not much done nor planned, but alot of dreams. I'm just looking for simple upgrades right now, I have a K&N cia kit, but with a AEM dryflow airfilter, next maybe the spark plugs, wires, exhaust. Kinda on a budget, ie married with 2 kids. Thanks for any help