3db Racing Antenna recommended when it can be mounted in the center of a flat roof, with no objects 18" in any direction. If you have a roof rack, light bar or need to mount somewhere other than the center of the roof, select the No Ground Plane Antenna.

Frequency Range: 138-174mHz Please specify race channel in notes above or we will tune (cut) to mid (151.625)

Cut Chart:
Frequency    Whip Length
150              45 1/8"
151              44 3/8"
152              44 1/8"
153              43 3/4"
154              43 3/8"
155              42 7/8"
156              42 5/8"
157              42 1/4"
158              41 3/4"
159              41 1/4"