its jsut under 2 1/4" at its widest but it has some pretty shitty crushes and bends that dips well under that. might be a good upgrade though, i wouldnt go any larger.
Oldschool 1977 RT104 Corona (hey it's a 2L it must be quick...)
Ex Zenki 1995 AE111 Levin (15.013@149.12kph)