Ive thought about this too..
Cons,
1) increased wheelwell gap (could still be fine with lower springs). Diameter will be 23.97 inches vs 24.46 inches stock so gap will increase about .25 inch.
2) May not fit (but my guess is they would)
3) Speedo off trivially (will read 2.5 MPH high at 100 MPH)
Pro
1) Possible more tire contact patch (iffy because 6.5 inch wheel is borderline for 225 mm crosssection
2) Car will be quicker (No doubt about it)! You effectively shorten final drive from 4.06 to 4.13.
If I had the BAT springs, I might do this
