Custom fuel rails for your z31 in either 3/8" or 1/2" sizes.
Can be made to fit either 11mm or 14mm injectors.
Fuel line fittings also need to be specified.

You may need to modify your lower intake for these to fit. There are little tabs around the inlets of the ports that need to be taken off. You can do this with a file and about 45mins

These rails are produced per order, Please allow 2 weeks for production time.