Turbonetics turbo kits?
 

Will one of these kit bolt on a 92 without any modifications.

http://www.turbo-kits.com/240SX_turbo_kits.html

what motor you plan on turboing..KA///SR//RB//???..theres ususally always modifcations you will need to do, usually minor....installed turbo kit on my SR-AND-RB the only two things i had to modify was to cut hole for intercooler piping, and remove front support bar in front bumper for intercooler

Its for a stock ka24de motor.