The CTA Injector Seat and Chamber Cleaning Set, No. 7810, cleans the injector seat and hole prior to installation of a new injector. Cleaning the seat and hole is a crucial step in the installation process of all injectors. The kit includes: two metal brushes in sizes 20mm and 25mm for injector hole cleaning, two front brushes for injector seat cleaning, one front brush extension, two seal plugs to close the injector hole while cleaning, one seal plug holder to install and remove the plug, and one sanding kit with paper and paper support. Instructions are included in the kit.