Dodge 2016 Viper SRT ACR Owner's Manual page 16

2.6 Rear Wing (Continued)
Wing Adjustments
It is possible to adjust the wing using the hole pattern at the top front of
the stanchion.
NOTE: Adjustment to the wing setting is not recommended.
The wing is attached to the lower stanchions with thread locker and tamper
resistant fasteners.
In general, moving the wing up (e.g. Hole 2 to Hole 1) will decrease rear down
Standard Viper ACR Adjustment Hole Numbering
force and decrease overall grip and understeer.
Each successive hole increases the wing angle of attack by 1.5 degrees.
Extreme Viper ACR Adjustment Hole Numbering