Originally Posted by
Jerry L
Changed back to the stock oil fittings today, measuring the stock one more accurately it is about 6.19mm and the replacement is as reported at 2.5. I have attached pics which include the Porsche P/N for the set I had, also for some who may not know what is in their motor a side view with the groove cut into the hex indicated the restrictor fitting. Also as a note while fittings were off looking at the oil line fitting the ID of the steel line that gos into the banjo fitting may be slightly smaller than the 6.1 diameter in the fitting, maybe 5.7 with a small hole gauge but very hard to get a good reading, would be interesting to cut a banjo in half to get a good measurement but no spares or old lines.
In doing this I remembered debating about drilling them to some where between 6 & 2.5 but went with the as suggested restrictor, not any more, may drill these to 4.5 but doubt I will see any O.P. issues as I did not prior to the change.
Best Regards