The 1989-93 535i is a powerful car, however, BMW didn’t spend any more time tuning the car than they had to. The TMS Performance Chip for this car was tuned on the dyno to yield as much performance from this engine as possible and still maintain its great reliability. 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.

For the 535i, we need to know if the car is a manual or automatic.