Need a chip to bypass the VATS security in your 1986-1993 TPI V8 F-body or Corvette? We have a chip to do just that. You will be mailed a piggyback adpater that plugs in between your stock chip and stock computer. Instructions included. Be aware there are two VATS systems in most GM cars; a starter interrupt and PCM/Injector security. We can only disable what is inside the PCM. To disable the starter interrupt you will need to find the starter relay and bypass it by jumping pins 87 and 30. You must provide your stock prom code in the field above, or in the comments section when checking out. Your stock prom code will consist of 3-4 only letters, no numbers. Example BDZL, BUC, BAFL. It is found on your stock chip and/or on your stock computer. TBI cars are not supported.