02-4.8ltr-truck

I am Anthony and new here,I am an avid motocycle drag racer and VW performance engine builder!.I dont know anything about what is available to get more out of my 4.8 liter truck(CA).So I signed up here to get info for my workhorse.I am not familar with my trucks engine!(I think its and LS-1 engine not sure???)I just want to get a little more performance out of it!I am aware of a few things and will get these mods done soon(laptop tuned)I have a K&N air filter and a flowmaster muffler and thats it!