Quote:
Originally Posted by MetroMPG
I did a poor A-B test on an undertray on my Firefly a long time ago...
2% improvement at around 90 km/h (55 mph), if I recall.
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Funny that you mentioned that today. I got around to installing the rear under tray today. Even if it shows little improvement in the Geo, it will still benefit by reducing road noise.
Next up: Front under belly tray