I finally got time and replaced Horns. No special modification required. Only needed following tools: - Flat screw drivers - 10mm/12mm lug nut sockets and driver Replacement Horns: (Purchased with suggestions from our friends @ Priuschat posts) Replacement_Horns by jm98 posted Nov 17, 2017 at 2:51 PM Remove cover: 06_Prius_Removed_Cover by jm98 posted Nov 17, 2017 at 2:51 PM Horn # 1 Removed and installed 06_Prius_Old_H1 by jm98 posted Nov 17, 2017 at 2:51 PM Installed_H1 by jm98 posted Nov 17, 2017 at 2:51 PM Horn # 2 Installed Primary_New_horn_replaced by jm98 posted Nov 17, 2017 at 2:51 PM Installed_View3 by jm98 posted Nov 17, 2017 at 2:51 PM Installed_View2 by jm98 posted Nov 17, 2017 at 2:51 PM I did not replace relay switch that came with new horns. It's rated 10Amp and 30? . The new horns sounds fantastic as is with existing wiring and relay switch.
Front Grill removal not needed as I was able to pull old horns and install new horns from space between frame and front grill.
