E28 535i Turner Motorsport Conforti Performance Chip
The 3.5 inline-6 is a torquey car, however, it could be a little more powerful in the upper RPM range. With a Turner Performance Chip power is boosted at all RPM with a huge 29ft-lbs of torque gain at only 2000 RPM. This chip was tuned on the dyno to yield as much performance from this engine as possible and still maintain its strength and durability. Jim Conforti tuned the fuel and spark maps to take advantage of 91 octane gasoline. By making the engine more efficient with this fuel, gains in horsepower and torque are achieved as well as making the engine run smoother.
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.
1985-1988 535i M30B34
Horsepower Gain Up To:+24 @ 5,000 RPM
Torque Gain Up To:+29 @ 2,000 RPM
New Rev Limit6,600 RPM
E28 535i 85-88Bosch 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.
manual or automatic transmission
This performance chip fits the following BMWs:
1985-1988 E28 BMW 535i 535is
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
Product Details
The 3.5 inline-6 is a torquey car, however, it could be a little more powerful in the upper RPM range. With a Turner Performance Chip power is boosted at all RPM with a huge 29ft-lbs of torque gain at only 2000 RPM. This chip was tuned on the dyno to yield as much performance from this engine as possible and still maintain its strength and durability. Jim Conforti tuned the fuel and spark maps to take advantage of 91 octane gasoline. By making the engine more efficient with this fuel, gains in horsepower and torque are achieved as well as making the engine run smoother.
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.
1985-1988 535i M30B34
Horsepower Gain Up To:+24 @ 5,000 RPM
Torque Gain Up To:+29 @ 2,000 RPM
New Rev Limit6,600 RPM
E28 535i 85-88Bosch 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.
manual or automatic transmission
This performance chip fits the following BMWs:
1985-1988 E28 BMW 535i 535is
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
- E28535
