{"product_id":"kartboy-kb-001-01005-sti-6-speed-solid-shift-joint","title":"Kartboy 04-21 Subaru STi 6-Speed Solid Shift Joint","description":"\u003ch4\u003eEliminate Slop and Restore Direct Gear Engagement on Your 2004-2021 Subaru STi\u003c\/h4\u003e\u003cp\u003eThe Kartboy KB-001-01005 Solid Shift Joint replaces the compliant rubber bushing at the base of the 6-speed shift lever on 2004-2021 Subaru STi models. The factory joint uses a rubber-isolated pivot that flexes under load, creating shift slop, imprecise gate feel, and missed shifts during aggressive driving. The KB-001-01005 replaces that rubber with a solid machined joint, providing a direct mechanical connection between the shifter and the transmission for noticeably shorter throws and sharper gate definition.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid machined construction eliminates the rubber deflection of the OEM shift joint\u003c\/li\u003e\n\u003cli\u003eDirect bolt-in replacement for the factory 6-speed shift joint on 2004-2021 Subaru STi\u003c\/li\u003e\n\u003cli\u003eReduces perceived throw length by tightening the mechanical slop at the pivot point\u003c\/li\u003e\n\u003cli\u003eImproves gate definition and accuracy during fast sequential shifts\u003c\/li\u003e\n\u003cli\u003eCompatible with stock shifter, short throw shifters, and Kartboy short throw kits\u003c\/li\u003e\n\u003cli\u003eMachined to OEM dimensional spec for straightforward installation\u003c\/li\u003e\n\u003cli\u003eDurable construction for long-term use under track and street conditions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eTrim\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e2004-2021\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza \/ WRX\u003c\/td\u003e\n\u003ctd\u003eWRX STI\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number (MPN)\u003c\/td\u003e\n\u003ctd\u003eKB-001-01005\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e2004-2021 Subaru STi 6-Speed Transmission\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eSolid machined joint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Replacement For\u003c\/td\u003e\n\u003ctd\u003eFactory rubber shift joint \/ pivot bushing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Transmissions\u003c\/td\u003e\n\u003ctd\u003e6-Speed (STi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e850014195672\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e1x Kartboy KB-001-01005 Solid Shift Joint\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eAbout Kartboy\u003c\/h4\u003e\u003cp\u003eKartboy is a Subaru-specialist performance parts manufacturer known for producing short throw shifter kits, shift linkage components, and suspension bushings that improve driving engagement without sacrificing street usability. All Kartboy components are engineered and manufactured to precise dimensional tolerances for bolt-on installation on the specific Subaru platforms they are designed for.\u003c\/p\u003e\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\u003cstrong\u003eWhat does the Kartboy KB-001-01005 solid shift joint do?\u003c\/strong\u003e\u003cp\u003eThe KB-001-01005 replaces the factory rubber pivot bushing at the base of the 6-speed gear lever on 2004-2021 Subaru STi models. The OEM rubber joint flexes under shifting force, causing imprecise gate feel and missed shifts. Replacing it with a solid joint tightens the mechanical connection for direct, accurate shift input.\u003c\/p\u003e\u003cstrong\u003eWill the KB-001-01005 make my shifts noticeably shorter?\u003c\/strong\u003e\u003cp\u003eThe solid joint removes the rubber deflection inherent in the OEM pivot, which translates into a perceptibly tighter and more direct shift feel. For the most dramatic throw reduction, pairing the KB-001-01005 with a Kartboy short throw shifter kit delivers the maximum effect.\u003c\/p\u003e\u003cstrong\u003eIs the Kartboy KB-001-01005 compatible with my short throw shifter?\u003c\/strong\u003e\u003cp\u003eYes. The KB-001-01005 is compatible with the stock Subaru STi shifter as well as Kartboy and most third-party short throw shifter kits. It addresses the pivot joint separately from the lever arm geometry, so it works alongside throw-reducing kits without conflict.\u003c\/p\u003e\u003cstrong\u003eDoes installing the KB-001-01005 require removing the transmission?\u003c\/strong\u003e\u003cp\u003eNo. The solid shift joint is accessed from inside the cabin or from underneath the vehicle at the shift linkage, depending on the specific model year. The transmission does not need to be removed for this installation.\u003c\/p\u003e\u003cstrong\u003eWill the Kartboy solid shift joint increase NVH or vibration into the shifter?\u003c\/strong\u003e\u003cp\u003eA solid joint transmits more mechanical feedback than rubber, which means some additional vibration may be felt at the knob under certain conditions. Most STi drivers find this feedback informative rather than intrusive, particularly during track use. Street-only drivers sensitive to NVH should consider this before installing.\u003c\/p\u003e\u003cstrong\u003eDoes the KB-001-01005 fit both the USDM and JDM 2004-2021 Subaru STi?\u003c\/strong\u003e\u003cp\u003eThe KB-001-01005 is designed for the 6-speed transmission used in the 2004-2021 Subaru STi. Confirm your specific transmission code matches the 6-speed STi unit if you are installing on a JDM-spec vehicle, as JDM and USDM STi transmissions share the same basic architecture on this platform.\u003c\/p\u003e\u003cstrong\u003eIs the Kartboy KB-001-01005 a direct drop-in replacement?\u003c\/strong\u003e\u003cp\u003eYes. The KB-001-01005 is machined to the same dimensional interface as the OEM rubber shift joint, so it installs in the factory location without modification to the shifter housing, linkage, or chassis.\u003c\/p\u003e\u003cstrong\u003eCan I install the KB-001-01005 on a 5-speed Subaru WRX?\u003c\/strong\u003e\u003cp\u003eNo. The KB-001-01005 is designed for the 6-speed transmission found in the STi. For 5-speed WRX shift joint upgrades, Kartboy offers separate components designed for the 5-speed linkage architecture.\u003c\/p\u003e\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\u003col\u003e\n\u003cli\u003eShift the transmission to neutral and engage the parking brake before beginning any disassembly.\u003c\/li\u003e\n\u003cli\u003eRemove the shift knob and shift boot from the center console.\u003c\/li\u003e\n\u003cli\u003eLocate the shift joint at the base of the lever and remove the retaining hardware securing the factory rubber joint.\u003c\/li\u003e\n\u003cli\u003eRemove the OEM rubber shift joint from its pivot location.\u003c\/li\u003e\n\u003cli\u003eInstall the Kartboy KB-001-01005 solid shift joint in the factory position, ensuring proper seating at the pivot interface.\u003c\/li\u003e\n\u003cli\u003eReinstall retaining hardware to factory torque specification.\u003c\/li\u003e\n\u003cli\u003eReinstall the shift boot and shift knob.\u003c\/li\u003e\n\u003cli\u003eCycle through all gears and confirm smooth engagement before test driving.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"Kartboy","offers":[{"title":"Default Title","offer_id":46027055595599,"sku":"KBYKB-001-01005","price":116.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/Kartboy_KB-001-01005_STi_6-Speed_Solid.png?v=1783523594","url":"https:\/\/www.blackopsautoworks.com\/products\/kartboy-kb-001-01005-sti-6-speed-solid-shift-joint","provider":"Black Ops Auto Works","version":"1.0","type":"link"}