If you're looking for a significant bump in power you need not look any further than a TMS Performance Chip. Designed to maximize the advantage of premium fuel, Performance Chips safely alter the fuel and timing maps which results in more power and a smoother engine. These chips were tuned by Jim Conforti on the dyno with fantastic results. What you feel is more power starting at 3500 RPM and continuing up to redline. There is no downside - only an awakened engine and a car with new life!

Horsepower Gain + 29 @ 5500RPM
Torque Gain + 35 @ 3600RPM
New Rev Limit EML controls redline

For the 850i/Ci we need to know which computers were installed on your car. Please check the ECU number located on the computer's cover. We also need to know if your car is a manual or automatic transmission.

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