View our Specials! Coupon Code: SaveIn2026
Looking for aftermarket parts to modify or upgrade your 2017 Subaru WRX STI with wiring harnesses? At Tunersports.com we carry a huge selection of the top name brand performance wiring harnesse parts and accessories.
 IN STOCK WS15-HHWHThe TurboXS 2015 - 2021 WRX STI Hella Horn Wiring Harness plug and play harness is the best on the market for Hella horns. It is made with high-quality materials and construction, and it is easy to install. The harness includes all the necessary connectors and wires, so you can simply plug it in and... Turbo XS 15-21 Subaru WRX STI Hella Horn Wiring Harness 2015-2021 Subaru WRX STI Base / Limited $58.83 |