Peter Keane talked to the D-Prepared Bayles Elite Racing BMW 325i driver this morning, and called me after leaving the track about an hour ago. The guy told Peter that he normally runs in ITS with its 29mm SIR or ITR without the SIR, so the swap to BP took nothing more complex than adding a couple of letters to the side of the car. (The guy ran the ITR Regional race the previous day.) Oh yeah, he also mentioned that he's building another 325 specifically for BP to take advantage of the more liberal engine rules. Sorry, I forgot to ask Peter if he got the guy's name.
Stan