Why not install the secret factory setup on your 914 1.7 or 2.0? It will increase top end performance and is factory authorized! This special pressure sensor, once installed will give a noticeable increase in top end power and still pass current emissions standards. Kit includes pressure sensor and factory head resistor
Kit consists of:

1 - b0280100037 - rebuilt pressure sensor 914 2.0 euro high performance

1 - g91460610100 - 914 ballast resistor for use head temperature sensor