i dont know much about the fit yet. dont really like the body style so never test drove it. but its a semi auto transmission not full auto. its an electric shifter on the automatic transmission. the paddle shifters let you shift when you like kinda formula one style. the S does seem to be like what would be on a regular car P R N D4 D3 (2) (1) like the bottom shifts i wouldnt paddle shift on (S) the thing is the Sport just gives you a nicer sportier look the regular Fit also has it the same way as in the P R N D S its just like a lower gear. but ill look more into it like the engine swap you wanted to know about. im not sure but u might just need motor mounts to drop in the k20