Horsepower Gain, 1985-87
+ 24 @ 5000 RPM
Torque Gain, 1985-87
+ 29 @ 2000 RPM
New Rev Limit, 1985-87
6600 RPM
Horsepower Gain, 1988-89
+ 43 @ 6250 RPM
Torque Gain, 1988-89
+ 21 @ 2000 RPM
New Rev Limit, 1988-89
6800 RPM
For the 1985-88 635CSi, you will have to check the part number on your ECU. If your ECU ends in 059, we will need to know the number of pins on your original chip.
For the 1989 635CSi, we only need to know if the car is a manual or automatic.
