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Intrax recommends a so-called coil over set
Cat-Back-System for BMW 1 Series F20/ F21 and 1 Series F20 LCI/ F21 LCI consists of:
For OEM exhaust system
leaving essentially no gap after the lip is installed
The stock DME calibration is suited to the high back pressure smaller diamater stock header system
Evolve ECU Remap Performance Upgrade - BMW E60 | E61 5 Series 535d (286 BHP) Evolve Downpipe Intrax recommends a so-called coilThis ECU remap is for installation at Evolve or at one of our dealers. The software upgrade was designed and tested at our dyno facility and on road to give optimal performance with maximum safety. Much time was taken to develop the software to give improved throttle response and factory like drivability with a progressive power delivery. The end result is a 535d which is significantly faster to accelerate and smoother to drive while at the same time