Shock bladder upgrades. 
It’s designed to give you a better shock response, reduce heat, and easily fitted and serviced. This translates into a more compliant chassis. 
We use genuine Showa and Kyb bladders in our builds. We have worked hard on gaining a great nitrogen volume where possible to give the best feeling. 
Crafted here in house using locally supplied 6061/6063 materials, we turn and mill it using our state of the art Doosan cnc machine. 
Using easily obtained tooling this can be fitted & serviced as required. 
Of course it’s recommended for use by trained professionals.