8v piper 4-1

  1. #1
    I am going to be fitting my piper 4-1 manifold to my vtr tomorrow and I'm wondering how people who have fitted one, have routed the pre cat lambda sensor, as it originally goes to the top of the manifold but on the piper manifold the lambda sensor hole is near the centre pipe joint. Any help is much appreciated, Sam.
  2. #2
    you put the pre-cat lambda in that hole near the centre pipe join, so it reads dirty exhaust gases.
    then you put the 2nd lambda into a sleeve so it reads "clean air"