82-92 Camaro / Firebird ECM Module Select Service Number. These are good used ECM Computer units. The MCAL Prom IS NOT INCLUDED. You must call or email for pricing and availability on the complete unit with MCAL Prom. We will need to know the year, model, engine & transmission. Shipping is not included. Call or E-Mail for more information. We do need to have your original service number, be sure to have this before calling or emailing.