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The secondary catalytic convertors are removed
A good header design is key to unlocking performance gains from naturally aspirated motors
The Evolve 4-1 headers can be used in isolation without any other performance upgrade and give a minimum gain of 30 hp and 27 lb/ft torque
The engine found in the Z4 30i respond well to the right type of ECU software
The additional air inlets serve on the one hand a sportier look and on the other hand better ventilation of the engine
Evolve Remap - BMW E89 Z4 35i 306hp (N54) M2 Competition The secondary catalytic convertors areThis ECU remap is for installation at Evolve or at one of our dealers. Evolve are at the forefront of BMW Z4 35i N54 twin turbo performance tuning with our Z4 35i ECU and performance upgrades fully tested on our dyno as well as countless hours on track and at the Nrburgring. Being one of the first in the UK to upgrade BMW's 3. 0l twin turbo engine we have an indepth understanding of how to go about turning the N54. Our tunes deliver significant power