Weapon R header...

[cali yaris]

Can you post a few more pictures of the new stock header? Looks different than previous years.

[tooter]

Originally Posted by cali yaris

Can you post a few more pictures of the new stock header? Looks different than previous years.

Yes, it's very different.
I'll post detailed pics tommorrow when there's good daylight. It's a really strange combination of tubing with a falafal like shell molded over them with a welded seam all around the edges. It must work pretty well overall, because the factory has the luxury to test its designs to see what works best over the widest range of driving conditions.

Bottom line: I'm totally pleased with the low end torque of this Tri Y header. It outperformed my expectations.

[vten]

its the same design witht the one I have since a couple years ago .

it's a good buy

[tooter]

Originally Posted by cali yaris

Can you post a few more pictures of the new stock header? Looks different than previous years.

Hey Cali,

Here's some pics of the 2012 OEM header. Note the horizontal bulges connecting the outer two tubes...



...and on the other side horizontal bulges connecting the inner tubes. Toyota configured their OEM header a semi-tri y design although none of the tubes are discretely separated from each other like the WR header.



The inside is all one open smooth undulating chamber.





What had appeared to be tubes welded inside the engine flange are actually the two halves of the formed metal header shell. Each side makes up 180 degrees of the tubes.



It reminds me of those hot pressed sandwich makers that seal the sandwich all around the edges, except in this case the sandwich is welded. Side view shows the full length weld.