My new Truck! 01 H/T

just got a 2001 sierra h/t.....it has the 4.8 vortech. all i've done so far is put on some flowmaster 40 series. just wanted to get any suggestions on what you think i should do to it. thanks.
http://www.cardomain.com/memberpage/279181/2 <----pics

Leave it alone........when you start to play it messes things up