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K40 Trunk Lip CB Antenna


  • A versatile, high performance antenna that can be installed on your vehicle lip or roof
  • Features a twist-to-remove base for CBers that frequent low clearance areas
  • All-in-one antenna includes mount, 58" whip antenna & 18' of coax
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No drilling or special tools required for this set up. The K40 is popular for its incredible transmit and receive performance as well as its versatile options for installation. You can choose to attach it to your truck lip with the included mount or permanently install it on your vehicles roof (drilling required) with the included hardware - the choice is yours. The twist-to-remove features allows the antenna to separate at the base, ideal if you’re entering a low-clearance area. The workmanship on this unit can’t be beat, and it's backed by a five-year guarantee from K40.

Model / SKU:K40
Recommended for:Car, van, SUV and pick-up truck owners who want a performance CB antenna. The twist-to-remove feature makes this antenna a great option for people who often enter low-clearance antennas. The whip and coil can be easily stored away while the coax and mount remain in place.
Notable Features:Strong Transmit/Receive Performance, Versatile Mounting Options, Twist-to-Remove Base
Compatible with:
All CB radios. The trunk-lip mount allows the antenna to be mounted to any car with a trunk lip. For permanent roof installations, you'll need to drill a hole in the mounting surface with access from below. For installation with vehicle headliners, the headliner must be removed prior to drilling. The coax cable connects to the antenna at a very low angle, so it's possible to re-install the headliner without noticing the coax or antenna mount post-install.
Antenna Length(s):
Antenna Color(s):
Approximate Range:
Range(s) provided are for comparison purposes only and are subject to numerous installation and environmental variables. For more detailed information, please see our reference article on CB Antenna Range Approximation.

  • Approximately 5 to 7 miles
Product Includes:58" K40 CB Antenna
18' of shielded coax cable

This lip-mounted CB antenna from K40 provides a number of attractive features, including twist-off removal of coil and whip, a long 57" steel whip antenna and an extended five-year manufacture's warranty. The antenna can be mounted permanently on the roof (drilling required), OR on the trunk lip for a secure but less permanent installation. Our pictures show a rooftop mount, but trunk-lip installations are easy with the included trunk-lip adapter.

K40 guarantees this antenna will work better than your current model or it will refund your money! (See manufacturers site for full details.)

Lip mount for easy installation
Can also be installed as a permanent roof-mount antenna
57 1/4", 17-7 stainless steel whip antenna
Includes 18' custom-made RG-58A/U 95%
Shielded coax, stranded to prevent breakage
Exclusive METLPLAS construction for superior performance
Unique capacitor for consistent SWR across all 40 channels
Base rotates 30 degrees for proper vertical polarization
Special radiused tip to dissipate static
No static ball to get knocked off
Whip retracts 2-1/4" into coil for super easy tuning
Isolation chamber reduces static damping
Quarter-turn release makes for easy removal of coil and whip
Made in U.S.A.
Five-year warranty


Customer Reviews

Based on 19 reviews
Stephen J.
Works Great!

Installation took less than an hour including trimming/tuning with SWR meter on my Hyundai Elantra. Works very well with my Cobra 75 WX ST CB. I am able to send/receive up to 13 miles distance loud and clear, which really is impressive. Right Channel Radios had the information and equipment I needed to get my CB up and running. Thank You!

Alejandro S.


Wayne T.
K40 Trunk Lip CB Antenna

This purchase is a replacement for this exact model I bought 20 years ago. Its been installed on several vehicles over those years. The last 8 years I have it on a Dodge Grand Caravan. I have installed it on the front hood on the drivers side. I can easily remove the whip for parking garages or the car wash. I had the signal checked professionally and it works very well in the configuration.

John P.

I love it I have owned one in the passed love that you can take it off and get it out of the way. Wish it still had a dust cover

Mark A.
Mine arrived defective.

Fast shipping. However when i recieved it there is a huge scratch through the red k40 paint. It was also missing one of the trunk mount screws, and the other was stripped. Lastly the wip itself is roughly cut which means this thing is obviously a return that they sent me. Will not be purchasing from Right Channel again. Ripped me off.

Hi Mark,

Thanks for the review and we're really sorry to hear about the antenna. We never ship returns and keep a process in place so that doesn't happen. Regardless, we're happy to take this antenna back for a full refund and we can get you a return shipping label. Please reply and let us know if that works!