the truck has a huge air intake filter, id like to open it up and the exhaust up by getting rid of the huge muffler ,duling the pipes out to side and a power programmer i cant find any after market products , i dont want to trip any codes by opening up intake and exhaust anyone out there ever tried any of this, any experiential knowledge will be quite helpful the truck runs like crap. it only has 8000 on it ive been running 87 octane in it ,it sits a lot , just had a new powersteering pump put in it ,the brakes been not all that great . i hope the pump will solve that problem it all runs in the same system , brakes and the power steering .