60mm on the left 52 mm on the right.
The second generation Eclipse Turbo ('95-'99) comes with a smaller throttle body (TB) than on the earlier Eclipse Turbo. The 1G Eclipse Turbo ('91-'94) came with a 60mm TB plate, while the 2G Eclipse Turbo TB plate is 52mm in diameter. The TB on the 2G Turbo can be swapped for the larger 60 mm 1G Turbo TB with a minimum of modifications.
http://www.roadraceengineering.com/2gtbswap.htm
Threaded Mode