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This product was last offered at the strikethrough price on
03-27-2026
This product was last offered at the strikethrough price on
03-27-2026
This product was last offered at the strikethrough price on
05-03-2026
This product was last offered at the strikethrough price on
05-03-2026
| Horsepower Gain: | +29 @ 5,500 RPM |
| Torque Gain: | +35 @ 3,600 RPM |
| New Rev Limit | EML controls redline |
| Required Vehicle Info | |
| E31 850i/ci | Bosch ECU part number, beginning with "0 261" |
| manual or automatic transmission | |
This product was last offered at the strikethrough price on
05-03-2026
This product was last offered at the strikethrough price on
05-03-2026
Elevate your BMW's performance effortlessly with the Turner Performance Chip, the ultimate solution for adding power and torque. Dyno-tuned by BMW legend Jim Conforti, these chips optimize high-octane (91+) pump gas, enhancing mid-range torque and high-RPM horsepower. Fine-tuned fuel and spark maps ensure your BMW surpasses factory performance without compromising driveability. With over 20 years of expertise, Turner Motorsport and Jim Conforti present a chip that not only enhances performance but guarantees reliability.
Turner Performance Chips lead the BMW chip tuning industry, providing the best for your BMW.
This product was last offered at the strikethrough price on
05-03-2026
This product was last offered at the strikethrough price on
05-03-2026
| Horsepower Gain: | +12 @ 5,300 RPM |
| Torque Gain: | +20 @ 4,000 RPM |
| New Rev Limit | EML controls redline |
This product was last offered at the strikethrough price on
05-03-2026
This product was last offered at the strikethrough price on
05-03-2026
With the CSi BMW really turned out one of their finest engines. A touch more tuning by Bosch Motronic expert Jim Conforti yields just a little more punch from the big V12. Conforti altered the fuel and ignition mapping to take advantage of premium fuel (91+ octane). Although the 850CSi is required to run "premium" anyway, it is not optimized for it. Changing these settings results in more power and a smoother-running engine.
Turner Performance Chips provide the ultimate in performance advantage! Adding a performance chip to your BMW is the easiest and most cost effective way of increasing BMW power, torque, and performance with NO DOWNSIDES. Through years of BMW performance tuning, we are able to maximize power and torque gains for 91 octane fuel used in North America. By making changes in the ignition and fuel maps of the DME we are able to optimize performance with no side effects or compromises. Other changes will make your BMW smoother and more responsive than when it left the factory. Our chips have a lifetime warranty and a 30-day satisfaction guarantee. If for any reason you are not fully satisfied with the increase in power and overall drivability you can return the chip to Turner Motorsport for a full refund. Chips are supplied with detailed instructions and are user-installed in about an hour.
Horsepower Gain:+12 @ 5,300 RPM
Torque Gain:+20 @ 4,000 RPM
New Rev LimitEML controls redline
Click here for a dyno chart!
This performance chip fits the following BMWs:
1994-1995 E31 BMW 850CSi
