Make sure and read the directions. I have the G bar which is the sister of the air bar. The instructions said to install it with 1 degree less angle than the drivline angle for pinioin angle change under hard acceleration. I went with .5 less since mine is driven on the street 95% of the time. So you would be at 3.5 driveline sloping down towards the rear of the car and 3.0 pinion sloping up towards the front of the car. \\ My driveshaft also slope up due to the low ride height. It's fine if your angles are correct.
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Todd
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