Methanol coupling kit: straightforward installation. This kit only includes the coupling for the left and right sides. You will need other parts such as a nozzle, methanol pump, and controller, etc. Please get in touch with us if you need the full kit. This kit reduces air intake temperature by 30-40% and increases fuel by 20-30%. Compatible with Audi SQ7, SQ8, RSQ8, RS6, RS7 4.0TFSI.