1995 16bit Jwt ECU....."CALIBRATED" for 555's, Dual pop, M/t, and Fed emmisions. I bought this for my 91 z but its not compatible for my vehicle so if you have a Jwt for a 91 twinturbo 5speed fed i will trade ya. i will also take your stock ecu and nock off 200.00 and the Jwt ecu is yours.