WTB: Stock LT1 cast iron exhaust Manifold
#5
Yes. I'll be taking my Hooker LT's off. They were ceramic coated but the guy that had them before me had, in my opinion, a brain fart. When he got the headers, and I'm guessing here, he discovered they didn't have O2 bungs and he also either didn't have, couldn't afford, etc to get O2 extenders, so he drilled a hole in one of the primaries and welded an O2 bung there. So the O2's can only measure a single cylinder on each side of the motor. I can't help but think that the bulb in that 1.75 tube provides quite a restriction too. Plus, they look like they have been dinged by the odd speed bump too.