WELL I NEED HELP MY 2001 HAS A 4.3 AND IT SUCKS I HAVE PUT A SPACER AND K&N FILTTER TO GOT SOME POWER BUT I WANT MORE DOES ANY ONE KNOW ANY COMPANYS THAT HAS THE BEST UPGRADE FOR MY TRUCK OR IS THERE A WAY TO GET ONE SPECIAL FOR MY TRUCK. THANKS FOR ANY INFO![]()