This ECU chip appears to be an aftermarket performance PROM labeled “R 93”, which likely indicates a tune designed for 93-octane pump gas for the 1986–1987 Turbo Buick platform. The “R” may signify a Race/Red/Rev tune variant, but exact calibration details are unknown.
🔴Red Dot – unknown calibration
📦 Includes: Chip only (as pictured)
Condition Notes:
• Pins intact, no corrosion observed.
⚠️ Disclaimer: Tune parameters are unverified and have not been tested by T6P. All items are sold as-is with no returns or exchanges. Buyer must confirm compatibility with their ECU and fuel setup before use.
