brake booster

I recently replaced the power brake booster, brake booster vacuum sensor, brake light switch, and air pump. After completing this I did a brake flush and bled all of the calipers. I am still getting a stiff brake pedal and a C0021 code. After replacing the brake booster with a second new unit...

Hello, I looking to upgrade my brake booster, but the problem I'm running into is most booster I have come across are for automatic transmission. My 2012 jk is a manual. Does anyone know of a company or a band that will work for a manual jk?