The GFB 4003 STi 6-speed Short Shift Basic Kit offers a more affordable alternative to the full 4002 kit. It features an adjustable gear lever, allowing for throw reduction from the factory setting to around 32-35mm per gear. The kit can be upgraded with the 4002 linkage clamp for an even shorter throw of 20-22mm. Installation is quick and easy, taking about 30 minutes, with the included pin-press tool simplifying the process. This kit is perfect for those seeking a moderate throw reduction at a lower price, with the option to upgrade later.