Just like other wear and tear items, your factory rear shifter bushing will become soft overtime, creating a loose shifter feel and increased movement under all acceleration circumstances. The Kartboy unit eliminates this problem by tightening up any loose ends with their much stiffer design.

 

- 95A durometer polyurethane.

- Material color is black

- These are 100% guaranteed, and hand made in the USA!

- Will increase NVH (noise, vibration and harshness) due to upgraded polyurethane durometer rating. 

- Will NOT fit cable shifter 2015+ Subaru WRX models.