Hill Engineering has been working very hard over the last two years in completely reverse engineering the Marelli S85, S125 and S159 Distributors. Of course back in the day when these distributors were designed Marelli was not fortunate enough to have software like Solidworks or Solidworks simulation where we can actually test in the software advance weights/springs! We have painstaking re-created solid models of every single part and found certain areas that needed re-engineering to make them better. Fortunately these are only very small tolerance modifications that are not noticeable to the eye but when applied to these certain individual parts it makes a huge difference to the final assembly. Combines with our Ignition distributor testing facility we are very excited to be offering a 21st Centry improved range of Marelli distributors and parts.