{"product_id":"grimmspeed-02-14-wrx-sti-hella-horn-harness","title":"GrimmSpeed 02-14 Subaru WRX\/STI Hella Horn Wiring Harness","description":"\u003ch4\u003eSimple Wiring for Louder Horns\u003c\/h4\u003e\n\u003cp\u003eThe GrimmSpeed Hella Horn Wiring Harness gives 2002 to 2014 Subaru WRX and STI owners a straightforward way to wire up aftermarket Hella horns without splicing into the factory harness. GRMGRM040005 is built with automotive grade 16 gauge wire to minimize resistance and deliver maximum volume from the new horns, along with heat shrink crimp on terminals for a dependable connection. Protective wire sleeving keeps GRMGRM040005 looking clean while shielding it from abrasion and stress in the engine bay. Designed as a true plug and play upgrade, it connects directly to the OEM harness and installs in minutes alongside a set of Hella horns and a mounting bracket like the GrimmSpeed BroTie.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAutomotive grade 16 gauge wire for minimal resistance and maximum volume\u003c\/li\u003e\n\u003cli\u003eHeat shrink, crimp on terminals for a dependable connection\u003c\/li\u003e\n\u003cli\u003eProtective wire sleeving for a clean look and added durability\u003c\/li\u003e\n\u003cli\u003ePlug and play design that installs and uninstalls in seconds\u003c\/li\u003e\n\u003cli\u003eCompatible with the OEM horn harness connector\u003c\/li\u003e\n\u003cli\u003eCan be adapted for use with a more complex relay harness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2002-2014\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eWRX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2004-2014\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eWRX STI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eGRMGRM040005\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd\u003e040005\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Gauge\u003c\/td\u003e\n\u003ctd\u003e16ga Automotive Grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eHeat Shrink Crimp On\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003e2002-2014 Subaru WRX, 2004-2014 Subaru STI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003eNot published by manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1 GrimmSpeed Hella Horn Wiring Harness (GRMGRM040005)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAbout GrimmSpeed\u003c\/h4\u003e\n\u003cp\u003eGrimmSpeed is a Minnesota based performance manufacturer that focuses on practical, reliable upgrades for Subaru vehicles. GRMGRM040005 is part of their approach to making common upgrades, like aftermarket horns, easy to wire correctly the first time.\u003c\/p\u003e\n\u003ch4\u003eRelated Parts\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eGrimmSpeed 2015+ WRX\/STI Hella Horn Wiring Harness\u003c\/li\u003e\n\u003cli\u003eGrimmSpeed 08-18 Subaru WRX\/STI Lightweight Battery Tie Down\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFAQ\u003c\/h4\u003e\n\u003cstrong\u003eWhat is the 040005?\u003c\/strong\u003e\n\u003cp\u003eThe 040005 is the GrimmSpeed Hella Horn Wiring Harness built for 2002 to 2014 Subaru WRX and 2004 to 2014 Subaru STI models.\u003c\/p\u003e\n\u003cstrong\u003eWhich vehicles does GRMGRM040005 fit?\u003c\/strong\u003e\n\u003cp\u003eIt fits 2002 to 2014 Subaru WRX and 2004 to 2014 Subaru STI models with the factory horn wiring connector.\u003c\/p\u003e\n\u003cstrong\u003eDoes GRMGRM040005 include a relay?\u003c\/strong\u003e\n\u003cp\u003eNo, the standard harness skips the relay since GrimmSpeed testing found it added complexity without a meaningful volume benefit.\u003c\/p\u003e\n\u003cstrong\u003eCan I upgrade to a relay setup later?\u003c\/strong\u003e\n\u003cp\u003eYes, GRMGRM040005 can be adapted to work with a more complex relay based wiring setup.\u003c\/p\u003e\n\u003cstrong\u003eDo I need to cut or splice any factory wiring?\u003c\/strong\u003e\n\u003cp\u003eNo, it plugs directly into the factory OEM horn connector without any cutting or splicing.\u003c\/p\u003e\n\u003cstrong\u003eWhat wire gauge does this harness use?\u003c\/strong\u003e\n\u003cp\u003eIt uses automotive grade 16 gauge wire for minimal resistance and strong volume output.\u003c\/p\u003e\n\u003cstrong\u003eDoes this listing include a mounting bracket for the horns?\u003c\/strong\u003e\n\u003cp\u003eNo, this is the wiring harness only. A bracket such as the GrimmSpeed BroTie is sold separately.\u003c\/p\u003e\n\u003cstrong\u003eHow long does the install typically take?\u003c\/strong\u003e\n\u003cp\u003eOnce the horns and bracket are mounted, wiring GRMGRM040005 usually takes just a few minutes.\u003c\/p\u003e\n\u003ch4\u003eInstall Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eDisconnect the factory horn connector from the OEM wiring harness.\u003c\/li\u003e\n\u003cli\u003eMount the aftermarket Hella horns using a bracket such as the GrimmSpeed BroTie.\u003c\/li\u003e\n\u003cli\u003eConnect the female terminals of GRMGRM040005 to the spade connectors on each horn.\u003c\/li\u003e\n\u003cli\u003ePlug the male terminal end into the factory OEM harness connector.\u003c\/li\u003e\n\u003cli\u003eSecure the wiring away from moving parts and sharp edges.\u003c\/li\u003e\n\u003cli\u003eTest the horns before reinstalling the front bumper or trim panels.\u003c\/li\u003e\n\u003c\/ol\u003e\n","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":46078348689487,"sku":"GRMGRM040005","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/GrimmSpeed_Hella_Horn_Harness_02-14_WRX_STI.png?v=1784327912","url":"https:\/\/www.blackopsautoworks.com\/products\/grimmspeed-02-14-wrx-sti-hella-horn-harness","provider":"Black Ops Auto Works","version":"1.0","type":"link"}