Kartboy Solid Shift Joints 6-Speed Subaru STI 2004-2021 | KB-001-01005

The Kartboy Solid Shift Joints (KB-001-01005) are a direct-replacement upgrade for the factory rubber shift linkage joints on the 2004–2021 Subaru STI 6-speed transmission. Engineered to eliminate the vague, rubbery feel of OEM linkage components, these solid shift joints deliver a noticeably tighter, more mechanical connection between the shifter and gearbox — making every gear change more precise, confident, and responsive. Ideal for street performance drivers and track enthusiasts who demand the best possible shift feel from their STI. Key Features & Benefits Solid Construction — Eliminates the flex and deflection inherent in OEM rubber/bushing-style joints, resulting in a direct, mechanical feel with every gear change. Dramatically Improved Shift Precision — Reduces slop and vagueness in the shift linkage for shorter, more defined throws and confident gate engagement. Direct OEM Replacement — Designed as a 1:1 replacement for the factory shift joints; no cutting, drilling, or modification required. Bolt-On Installation — Straightforward installation that can be completed with basic hand tools in under an hour, no professional lift required. Durable, High-Quality Materials — Built to withstand the demands of aggressive street driving and track use without premature wear or failure. Broad Year Range Coverage — Compatible with the entire STI 6-speed platform from 2004 through 2021, covering a wide range of build years. Pairs Perfectly with Short Shifters — Works synergistically with Kartboy and other aftermarket short shifters for a complete, refined shift feel upgrade. What's Included Kartboy Solid Shift Joints — Full set for complete linkage replacement All necessary hardware for installation Specifications Manufacturer Part Number KB-001-01005 Brand Kartboy SKU kbyKB-001-01005 Category Drivetrain — Shifters Joint Type Solid (Non-Rubber) Transmission Compatibility Subaru 6-Speed Manual Application Years 2004–2021 Installation Type Bolt-On, Direct OEM Replacement Installation The Kartboy Solid Shift Joints are a true bolt-on upgrade. Installation requires basic hand tools and can typically be completed in under an hour by a mechanically confident DIY enthusiast — no professional installation or lift is required. The shift console and center trim will need to be removed to access the linkage. For best results, pair with a Kartboy Short Shifter and Shift Knob for a complete drivetrain feel upgrade. Always refer to vehicle-specific instructions or a factory service manual if needed.