CSF B58 | B48 All Aluminium Heat Exchanger Upgrade - BMW G20 | G21 | 320i | 330i | M340i | G29 | Z4 20i | 30i | M40i G20 This throttle actuator is a

This throttle actuator is a common problem due to a design flaw from when the internal gears were first manufactured

known as an ECU remap

F97) xDrive M40 i 09

Sold as a pair

The secondary catalytic convertors are removed

CSF B58 | B48 All Aluminium Heat Exchanger Upgrade - BMW G20 | G21 | 320i | 330i | M340i | G29 | Z4 20i | 30i | M40i G20 This throttle actuator is aAre you increasing the boost on your 2017+ A90 Supra, Z4 or 3 series via Stage 1, 2 or even a big turbo Stage 3 upgrade? You'll want to take a look at the CSF Heat Exchanger upgrade to keep charge temps consistently cool. Heat is the enemy of power and when boost levels are increased more heat is introduced into the boost system. The stock heat exchanger and charge cooler combination works well at stock boost levels but once boost is increased it can