E23 735i, E32 735i/iL Turner Motorsport Conforti Performance Chip
The TMS Performance Chip for the 735i/iL is designed to produce large quantities of torque in a very usable RPM range. Jim Conforti tuned these chips on the dyno and altered the fuel and spark parameters to get better output. The result is over 20ft-lbs of torque gain at only 2000 RPM and a broader power band all the way up to redline. Installing a TMS Performance Chip is a safe upgrade even on high mileage cars as the changes are made to optimize the engine for premium fuel (91 or higher). The top speed limiter is removed and the rev limit is raised (manual transmission model only).
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. See below for specific information that we may need from your BMW model.
1985-1987 735i M30B34
Horsepower Gain:+24 @ 5,000 RPM
Torque Gain:+29 @ 2,000 RPM
New Rev Limit6,600 RPM
1988-1992 735i/iL M30B35
Horsepower Gain Up To:+43 @ 6,250 RPM
Torque Gain Up To:+21 @ 2,000 RPM
New Rev Limit6,800 RPM
E23 735i 85-87Bosch ECU part number, beginning with "0 261"
For Bosch ECU "0 261 200 059", we need to know the number of pins on the original chip.
E32 735i/iL 88-92Bosch ECU part number, beginning with "0 261"
manual or automatic transmission
This item fits the following BMWs:
1985-1987 E23 BMW 735i
1988-1992 E32 BMW 735i 735il
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
Select Options
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
Lifetime Replacement Program! Read more here
This product was last offered at the strikethrough price on
05-03-2026
Product Details
The TMS Performance Chip for the 735i/iL is designed to produce large quantities of torque in a very usable RPM range. Jim Conforti tuned these chips on the dyno and altered the fuel and spark parameters to get better output. The result is over 20ft-lbs of torque gain at only 2000 RPM and a broader power band all the way up to redline. Installing a TMS Performance Chip is a safe upgrade even on high mileage cars as the changes are made to optimize the engine for premium fuel (91 or higher). The top speed limiter is removed and the rev limit is raised (manual transmission model only).
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. See below for specific information that we may need from your BMW model.
1985-1987 735i M30B34
Horsepower Gain:+24 @ 5,000 RPM
Torque Gain:+29 @ 2,000 RPM
New Rev Limit6,600 RPM
1988-1992 735i/iL M30B35
Horsepower Gain Up To:+43 @ 6,250 RPM
Torque Gain Up To:+21 @ 2,000 RPM
New Rev Limit6,800 RPM
E23 735i 85-87Bosch ECU part number, beginning with "0 261"
For Bosch ECU "0 261 200 059", we need to know the number of pins on the original chip.
E32 735i/iL 88-92Bosch ECU part number, beginning with "0 261"
manual or automatic transmission
This item fits the following BMWs:
1985-1987 E23 BMW 735i
1988-1992 E32 BMW 735i 735il
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
- 735CHIPS
