cspies86

will try and get a photo for you guys.  when i first got the engine it had all the emission stuff already on it but nothing went to that. the grub screws are fairly siezed in there i would say they have never been undone since new. 

hi trent,  neither oil or coolant run through this, that is why i am a bit curious.  I probably should have said that, for example, if you fill one of the ports with water it will run into the other twp ports through this passage. I thought maybe it could be to regulate exhaust pressure, but why only on 3 ports not all 4.

hi guys, i have a 18RC cylinder head that has a passage that runs between no 2, 3, and 4 exhaust ports with a grub screw above these ports as well.  Was wandering if anyone can tell me what the function of this would be.  It is not shown in any parts diagrams that i looked at. I am a bit curious to what it may be.