Sorry, I did mean to include it is a 2008 Roadster, therefore NA.
The more I look at it, it appears to be a 'T' inline with the 'T' port capped off and I really can't see what it's purpose is????
Glad it's not just me stumped....never seen nuttin like it on a good old American classic, actually there's a lot of wiring, plumbing and weird parts under that hood.
The old classics are so easy to work on, not complicated, but they sure don't drive like the xfire!