First you have to buy a high tone, otherwise it sounds stupid. This is part number 72102. This pair was used on the last 4 cars. The low tone has a habit of failing when it gets wet. This has happened to me twice. For some reason the treble works well when it gets wet. Make sure you tune the tone low where it won't get wet. Relay not included. You can install a relay, especially if your car is wired to a single horn. Horns draw 4.5 amps at 12 volts. This is usually within factory limits and most fuse boxes have a 10 amp or greater relay built into the horn circuitry. The kit includes 3 connectors, a mounting bracket and nut, and a jumper wire (required if your vehicle is wired to a single horn wire). And they are very loud. The packaging says 130 dB at 4 inches. I don't have a dB meter but I can assure you the horns will do the job. A few have a nice tone and will save your car from those little factory beep beep horns. Update: 04/09/2017. Bought a few more for my new car. Those are big horns. I support my previous review.
π Zento Deals 12V Single Trumpet Air Horn + Compressor β Powerful Loud 150db for Truck, Boat, SUV, Train
9 Review
Car compressor Aggressor AGR-75 orange
14 Review
π Enhance Your Chevrolet's Horn Sound with FARBIN Car Horn Special Plug: Wiring Harness Pigtail Connector
10 Review
XtremeVision AC 55W HID Xenon Premium Slim Ballast - Get A Pair Of 2 PCS Now!
18 Review
Nokian Tires Hakka Green 3 205/55 R16 94H summer
37 Review
Cordiant Road Runner 195/65 R15 91H summer
24 Review
SuperJump Trampoline with SuperJump 8ft (244 cm) net and ladder
29 Review
Get Ultimate Towing Stability With CURT TruTrack Weight Distribution Hitch & Sway Control - Up To 10K Capacity, 2-Inch Shank & 2-5/16-Inch Ball - In Sleek Black Design
30 Review