RRE with chip

Since November 2018 I am proud owner of a new RRE Td with 9 gear automatic and 150 hp and four wheel. Still, I would like to have more PS in this case. You read again and again, with chip you have more PS and less fuel consumption. I am absolutely lay and I have a few questions about the chip: – what experience did you have with which chip? – would it be better to let Landrover partner install the chip because of the warranty? Or can you leave any X-anyone who sells which chip? – do you have to type it? I’m from Austria, I think the rules are different than in Germany! Look forward to your comments Lg wh1sky