[brian944t]

Ive got a 72 240, and am planning on replacing the stock exhaust manifold with a header. its an original california car and i was wondering about removing that smog stuff, like the air pump and hoses that go along with it. can i just take that stuff off? any shared experience from someone whos done this would help.

 

[bakachan]

depending on which county in calif u live, you will have a smog inspection
every 2 yrs or only when car is sold. high smog areas its every 2 yrs
of course. smog pumps freeze up if they are not used. you can try putting it in
a sealed contains and wd40 the heck out of it.

im not too sure what the cutoff for being exempt from smog inspection
72 may be exempt already.

 

[shane280z]

Hi Brain944t.
Good suggestions from bakachan. You may also want to purchase a really good single blade hacksaw if you are installing your new header yourself. The old exhaust manifold will have the tell-tail metal air breathers going into the exhaust head port openings. And its a good bet these metal fittings are corroder as all heck. Cutting them to a 1/4inch to only a 1/2inch size will present no problems such as backfiring . Your new headers also may have or may not have these air metal breathers. Goodluck. shane-