Yes. The key is to use a smaller disc rotor than the RX7 rotor. RX7 4-pots normally use 276 mm discs, same diameter as the Verada/Diamante discs all of which normally take 15" rims.

The question is what discs to use?

If you were to put say Stanza/Sunny 245 mm discs on, it could fit under some 13" wheels. To fit the Stanza discs is fairly easy, however, they are only 10 mm thick, while the 4-pots are designed for 22 mm discs.