I have looked through the evo turbo builds and i have decided i would want to go with the obx style manifold. But im not dead set on obx i might go with the megan instead.



However there are 2 different designs this first one is the one i have seen people use here for their evo setups.



http://cgi.ebay.com/ebaymotors/OBX-T...Q5fAccessories







This one is significantly cheaper, but my question is why are there runners at the flange of the manifold, They connect opposite sides of the exhaust flow.



http://cgi.ebay.com/ebaymotors/Lance...Q5fAccessories

 

You know exhaust gases from cylinder 1&4 have to have their own collector, and same goes for 2&3 in order to efficiently utilize twin scroll.

 

Nm, I'm retarded and didn't click the links. I assumed you were showing me obx beta turbo manifolds.

 

maybe to use a EGT guage?



maybe cuz its cheap chinese sh*t?



f*ck if i know

 

Get the first one because it at least comes with a partial dump tube and is off set towards the driver's side which is what you want. The other one dumps in the middle and will be a pain to create a custom downpipe.

 

Both manifolds place the turbo in the same place. The only difference may be material and flow.

 

thanks for the fast replies, i was just curious wth those things were for.