i header is much better than a manifold better it will give you increased air flow horse power and gas mileage
It would be a waste of time and money. You would have to make a special adapter to hook the exhaust to the manifold. On a turbo header, the exhaust hooks to the turbo and the turbo to the manifold.
It is not worth the effort since it will probably just crack again; cast iron does not weld well. Use this as a good excuse to put on a header. I got a nice stainless steel header for my 1991 4.0L for $185 including shipping. The exhaust manifolds are also known to crack. If you do not want a header, another option would be to watch for someone that did put on a header but is trying to get rid of the stock exhaust manifold they took off.
Usually oxygen sensors are what would be screwed into the exhaust manifold.Usually oxygen sensors are what would be screwed into the exhaust manifold.
Assuming you mean bank 2 sensor 1, it would be the first O2 sensor located in the header pipe after the passenger side exhaust manifold.
Changing/altering the intake manifold, header, exhaust, and pulleys would yield you immediate improvements. The cheapest route to start is changing the intake manifold, from changing from a stock filter to a high performance re-usable filter all the way to a cold-air intake is one way. From there, changing the other components (header, exhaust, pulleys) will also cost more as you go along.
what is the cost of repair of Toyota 4runner exhaust manifold
exhaust?
true dual exhaust would mean that each pipe would be atached to an exhaust manifold of its own. It might be a v6 or v8 or as in the old days an inline 6 whith a split manifold was popular.
asuming the vehicle has a 4 cylinder, the exhaust manifold would be facing the radiator. 6 cyl. would also have one facing the firewall. You can figure it out simply by tracing your exhaust system from back to front. tail pipe - muffler - exhaust pipe - catalytic converter - exhaust pipe - exhaust manifold - engine.
Need to know if it is the intake manifold or an exhaust manifold and what is wrong with it.
2 ways. Easiest way: Remove the inlet manifold...should be alot of m6 torx bolta holding it. Then you unscrew all the 10mm brass nuts you find on the orginale header. Then you remove the two springs holding header to exhaust system. Then take the old one out... Install the new one ..remember to put new gaskets between headers and inlet manifold. You might have to weld or change the exhaust to make it fit the new headers. Would recommend using Supersprint headers with exhaust wrapping on it. Good luck
that would be either your catalytic converter or your resignator pipe.