Your stock exhaust manifold revealed
 

I recently installed the Open Flash Header on my car and thought I would share these photos.


This is the lump as it comes off the car.

Here is the heat shield removed.

And here are the parts of the heat shield.

As you can see the header is really not that bad a piece of work.
It is actually welded tubing rather than stamped steel as I expected it to be.


This may be why massive gains are not being seen with aftermarket headers. Because the stock one is really not that bad.


Another thing to notice is there is foam between the heat shield and the header. I'm guessing that this is the prevent rattling.


One thing you really have to think about is:


If Toyota went though all the trouble and expense of making this heat shield it must be there for a reason. (To prevent fires maybe?).


I think I'm going to wrap my header tomorrow.

Thanks for taking the pictures to share. Please let us know what you think about the wrap!

Very true. This looks much nicer than '90s cars and Honda manifolds that were a huge, ugly, cast iron brick that weighed 1000 lbs lol.

If this was stainless, shiny, smoothed joint connections, no heat shield, etc..it could easily pass for an aftermarket header..maybe borla or something.

While the stock header isn't a bad piece, a good aftermarket header + tune should still give you a better torque curve and a significant bump where the stock torque dip occurs.

Yea other forum members have already done this. sweet.
you can guy that cat out.

I'm impressed that the stock header is a stepped one (4-2-1) which is better then a 4-1 header. The only thing I think would make the stock header better is the size of the piping. Really this is a good stock header, all things considered.

not should.. they do! :D

yeah i agree with others. one of best good STOCK header i ever seen.

It seems like the cat is the biggest drawback

Mine went to the garbage can somewhere....

anyway you can measure the size of the ports on top, and also the exit port from the cat? thanks