hey yall im casey from louisiana. about a month ago i bought an 01 extended cab 4 door ls model silvy. 2wd 5.3. just put a 40 series flow master on it. its really clean for a 9 year old truck, all the bells and whistles, leather, rear ac, yada yada yada. glad i found this site. will be looking for a good intake, tune, and some other stuff later down the road. like the lsx intake mani/tb upgrade.