C.A.R.B Legal headers??

[Socal_GMC]

Will these work? Also what is Air injection manifold on the header?  http://www.summitracing.com/parts/BIG-49150FLT/Application/?query=Year%7c1977%7cMake%7cGMC%7cModel%7cC25%2fC2500+PICKUP%7cEngine+Size%7c5.7L%2f350

[Captkaos]

Link never came up for me.

[Socal_GMC]

Idk i tryed to fix the link. It works for me

[TexasRed]

Came up for me the first time too. Are you asking what AIR injection is or you asking if that there manifold has it?

[VileZambonie]

A.I.R. has tubes in the exhaust manifold. Those aren't for A.I.R.

[Socal_GMC]

Im asking what is AIR injection and if those are the little tube above the stock exhaust manifold for the emissinon?

[TexasRed]

Yeah, should be the tubes going into the exhaust from the air pump. It's injecting fresh air to get the exhaust gases to keep combusting after the exhaust valve. That way there's less raw gas in the air.

[Socal_GMC]

So i need headers to keep with that to keep my truck smog legal?

[TexasRed]

If your truck originally came with them, yup. 'Specially in california. You'll need the E.O. number which is the executive order by the California Air Resources Board which certified the part does not measurably increase emissions over the stock part.

[Jim Rockford]

Lets start with what year and model your truck is...