Looks to me from image 3 at the bottom of the page that the whole unit unthreads: http://www.mahle-powertrain.com/en/experience/mahle-jet-ignition/ http://www.m

Looks to me from image 3 at the bottom of the page that the whole unit unthreads: http://www.mahle-powertrain.com/en/experience/mahle-jet-ignition/ http://www.mahle-powertrain.com/en/experience/mahle-jet-igni...