Fits all WRX model years from 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 and STI model years from 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Shift knob functions perfectly with factory installed reverse lockout Machined with precision, powder-coated, and laser engraved shift pattern in Lancaster PA USA Ergonomically designed for ease of install (NO Modification Required), comfort, and enhanced shifting Weighted stainless steel; approx 500g The Billetworkz Shift Knob for 6 Speed Subaru WRX: 2015-25 / STI: 2004-21 Weighted Stainless Steel Gear Shift Knobs is designed to precisely work with the factory reverse lockout. Machined with precision and powder coated in Lancaster PA USA. An aluminum threaded insert will be included to allow for proper fitment.