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growing to an aggressive roar when driven hard but without droning
dyno testing and design optimisation
The cause may be a different diameter
CNC machined brackets and fittings for superb fit and durability
we designed a pair of tubes with smooth curves and with an innovative Venturi stack matched to the inner diameter of the filter neck
Evolve ECU Remap Performance Upgrade - BMW E71 X6 30d (231 BHP) E61 growing to an aggressive roarThe 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 30d which is significantly faster to accelerate and smoother to drive while at the same time returning 10 15% improved fuel economy. Overview: 60 bhp @ 4250rpm 40 50
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