MACE STAGE 1 PERFORMANCE UPGRADE TO SUIT ALFA ROMEO 159 939 939A5 939B1 939A2 1.7L 1.9L 2.2L I4This Mace ETC and K&N's air filter have been put together to meet the performance upgrade requirements of Alfa Romeo 159 fitted with 939A5, 939B1 and 939A2 I4 engines. Mace ETC eliminates the delay that exists between the throttle pedal and the butterfly in the throttle body, re establishing throttle response and bottom end acceleration while improving low torque. There are different performance modes in this electronic throttle controller that helps