I thought it had to do with reading the VIN and seeing if the body code / color code / model code and motor code from the VIN matched the car and its model designation ..
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R.I.P. Kevin "Slo-Si" Gonzalez
Hondata saves lives
S300 and K-Pro tuning 813-433-3721
Crome OBD1 Editing/Chipped ECU's/Wiring/Track Setup

Prayoonto/DSS/Precision/TiAl/JE/Eagle/PPG/Supertech Equipped