Originally Posted by
TheStig
This one has three ports, only difference I see is it doesn't have all the extra webbing. Is that part necessary?
Some or all, not sure which have the appearance of three ports but the oil cooling port is not a through hole.
Cutting costs is not worth the risk, part quality generally falls with the price. Get a part from a quality maker not some cheap Chinese copy that you will be replacing too soon.
SRT/SLK32 parts are harder to find, check the SLK32 ones on eBay.
One part you show is the SRT part and the other is presumably for the NA, two different parts altogether.