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The air gap between the two layers acts as an insulator to stop the conductive heat spreading to the inner layer
flow-optimized link pipes
For example
Replaces OEM unit single-pass design and plastic shroud with a unique top/bottom dual-pass design for maximum surface area and flow
Evolve ECU Remap Performance Upgrade - BMW E71 X6 30d (231 BHP) E61 The air gap between theThe 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