LUVTruck.com

what that piece thats right over the alternator has a belt going to it and goes to evey cylinder because i don't have on the holes in the head are rplaced with bolts does it give you extra horse power do i need it? or What? just curious.

It is the Air Injection Reactor (AIR) system. The belt driven bit is a pump that puts fresh air into the exhaust to help burn any last traces of unburnt hydrocarbon emissions as they go out the pipe. It does not give any horsepower (actually uses a little bit to run) but it does cut the emissions you are putting out. If you have to pass smog testing, it is usually required to be in place. Do you need it? That depends on if you can get the truck registered and pass smog without it.

Very nicely put there 800xl...I was stumblin for some words to reply to him but you said it all man.

well good thing i don't have to pass smog al though i can get on very easily but thank for the help.

would taht be the muched talked about and loved ( ) "smog pump"

I sold all my smog pumps to a core buyer no need for that junk here.

They also don't seem to take well to sitting idle from what I've seen. Might just be the wet PNW air, but I have not had good "shelf life" from them. I replaced one twice with a good working used pump that had been sitting around for a few years and both replacements didn't hold up long before the bearings went out. This is one item that if you need one you are going to do better with a new/rebuilt or one pulled from use very recently.