Im looking at getting a TBI blazer and am wanting to know did they have a smog pump with AIR injection into the manifolds. Id like to get headers and not have to deal with it and/or spend $$$ for headers with AIR injection. My cousin had a TBI Z71 and it didnt have AIR injection manifolds, we were able to throw some cheap shorty headers on. But I want full lengths and dual exhaust. Tho all I seem to find are dual 2 1/4" exhaust kits, would like a mandrel bent dual 2 1/2" header back kit.