I have a Jet Performance Products Stage II chip for sale. Made for '87 GN. I assume it will work on all intercooled Turbo Regals. I went to DFI so I can no longer use it. Tuned to produce more horsepower and torque between 1500rpm and open throttle compared to stock chip. Must use at least mid-grade gas (but who doesn't run at least premium anyway). For use with a close-to-stock motor. Jet recommends freer flowing intake and exhaust. costs 209.95 new. great way to add some power to a nearly stock setup. taking offers, will entertain trades too.