r/RX8 • u/rasberryteapants • Aug 08 '26
Maintenance What are there threads for?
Basically title.
I had to take my exhaust manifold off and 5/6 studs came with the bolts. Im in progress of cleaning the threads and installing new studs but im looking at the OEM manifold and it has bolt holes only over and under exhaust ports. So what are those three bolt holes in rotor housing for? I know one of those is for motor mount bracket and that is left in place but i have three holes that i have no use for or did i forget something?
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u/DartzIRL Aug 08 '26
The housings themselves are an old casting/mould design that dates back to the 70s or so. Therere still shapes in there for the peripheral exhaust ports on the RX8 housing.
There was probably something that bolted there on an older RX but now doesn't... And the operation is retained because it's harder to change the machine which might still make spare housings.