What is the purpose of the shifter springs? MTEC Shifter springs are designed to improve feel and confidence of the driver by strengthening one of the most vital parts of an automobile. Essentially it gives you a better connection to what gears you are looking for or are in. Which applications do the shifter springs fit? From our research any Honda K20a/z or K24 manual transmission should work. It doesn’t matter if it is a 5 or 6 speed transmission. Hybrid vehicles with K20/K24 swaps can use this to their benefit as well! If you have a vehicle that you are unsure about please email us and we will research it for compatibility. How hard is the shifter springs to install? Installation should be done by a professional if you are not confident in your mechanical ability. You can see the DIY instructions here.