E31 850i Turner Motorsport Conforti Performance Chip Set
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: +29 @ 5,500 RPM Torque Gain: +35 @ 3,600 RPM New Rev Limit EML controls redline
Click here for a dyno chart!
Required Vehicle Info E31 850i/ci Bosch ECU part number, beginning with "0 261" manual or automatic transmission
This performance chip fits the following BMWs:
1989-1995 E31 BMW 850i 850ci
Please ensure your correct model is selected
Does NOT fit your Change Vehicle
Fits your Change Vehicle
This product was last offered at the strikethrough price on
05-03-2026
Lifetime Replacement Program! Read more here
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Lifetime Replacement Program! Read more here
This product was last offered at the strikethrough price on
05-03-2026
Lifetime Replacement Program! Read more here
This product was last offered at the strikethrough price on
05-03-2026
Lifetime Replacement Program! Read more here
This product was last offered at the strikethrough price on
05-03-2026
Lifetime Replacement Program! Read more here
This product was last offered at the strikethrough price on
05-03-2026
Product Details
If you're looking for a significant bump in power you need not look any further than a Turner 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!
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:+29 @ 5,500 RPM
Torque Gain:+35 @ 3,600 RPM
New Rev LimitEML controls redline
E31 850i/ciBosch ECU part number, beginning with "0 261"
manual or automatic transmission
*Dyno HP and Torque figures are not guaranteed to test identically to posted numbers on your vehicle. Metrics we present were achieved in our own testing environment, however, a variety of factors may affect results of the tune on your vehicle*
This performance chip fits the following BMWs:
1989-1995 E31 BMW 850i 850ci
Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.
Prop 65 Warning
- E31850
