I'm in the process of making templates for my primarys, the plates are S5, ive noticed there is no egr passages in the ports, but does the egr passage way still exist above the ports? I ask because looking at the casting from the water jacket side, there seems to be alot more than i expected, and i suspect that it is the egr passage ways, which are still there but not connected to anything.

I don't think the EGR ports (if there is any - there shouldn't be - the Kouki turbo engine doesn't even run an EGR valve) come close to the primary intake ports on the center housing.





-Ted

None of the S5's had an EGR valve, and the passages are no longer in the housing either. Theres just water around the port.

thank you, i can find the exact casting thickness now and if worst comes to worst i can backfill.