These will fit 202, 203, 208, and 210 cars. No need for spacers, bolts right on and is hubcentric. Please contact me for more info.

18x7.5 F @ 599
18x8.5 R @ 629

peter@wheelexperts.com

what are the advantages of 2-piece wheels? (if any?)

Don't really think there's any advantages on 2-piece wheels vs a non multi-piece other than the 2-piece just looks more agressive.

Is that the only size? Do they have 18x9.5 available or 19"?

The 19s are the 2 piece CL wheel and it requires spacers to fit on C, E, and CLK cars.