I put a uni filter, RCR pipe and silencer, a bigger jet (or somthing like that) and a bigger clutch spring on my 00 Trail blazer. Either its a real slow machine (stock) or my speedometer isnt reading right. It says im doing 47 as my top speed. I figured it would at least do 50-55. How fast would it go if I ported and bored? Is it worth it?