Mishimoto Focus mk3 inc ST/RS expansion tank Colour:Black as the ECU will try

as the ECU will try to compensate for the lost boost pressure by increasing turbo speed

This exhaust has been designed to fit neatly with the M-Sport rear bumper and the 435i M-Sport lower rear panel (available separately)

extensive testing and for the skill of an automotive engineer

After years of intense research

Mishimoto Focus mk3 inc ST/RS expansion tank Colour:Black as the ECU will tryAdd some reliability and engine bay styling to your Focus RS ST with the Mishimoto RS ST expansion tank. This tank features internal baffles to prevent coolant starvation from overflow ports on the engine. Also, during high speed cornering, braking, and acceleration, the internal baffles reduce coolant sloshing. The engineers at Mishimoto have included a sight tube to allow for proper observation of hot and cold coolant levels, making engine