ECU PROM Chip — “Cottman’s Performance / Turbo Regal Red Stripe 20°/15°” (Aftermarket)

This ECU chip appears to be an aftermarket performance PROM labeled “Cottman’s Performance – Turbo Regal Red Stripe – 20°/15°”, suggesting 40 lb injectors, 20 lbs of boost.  a custom-tuned chip intended for the 1986–1987 Turbo Buick platform. The timing notation (20°/15°) likely reflects WOT timing settings in 1st/2nd vs 3rd/4th gear — common in early performance chips for drivability and knock control.

🟡 Yellow Dot – Actual Tune Performance Unknown 

🔧 Compatibility:
• 1986–1987 Buick Grand National / Turbo T / T-Type / GNX
• Fits OEM 1227148 ECU (factory Turbo Buick computer)

📦 Includes: Chip only (as pictured)

Condition Notes:
• Hand-labeled aftermarket performance chip
• Pins intact, no corrosion observed
• Designed for modified setups — not a stock calibration

Why You Want It:
Ideal for collectors of vintage Turbo Buick tuning hardware or anyone who wants to experiment with old-school tuning strategies from the early aftermarket era. Could be useful for testing or nostalgia-based builds.

⚠️ Disclaimer:
Tune parameters are unknown and have not been verified by T6P. All items are sold as-is with no returns or exchanges. Buyer is responsible for confirming compatibility with their ECU and combo.