Fits all fuel injection systems that are set up for drop in nozzle bodies and if you have thread in nozzle bodies RBS carries a thread in to drop in adpt.
Nozzle jets are sold individually and made from brass. Each jet is precision reamed to size so the hole will match the size. Size is laser-etched on each jet. When ordering specify what size and quantity. The smallest drop in nozzle jet is 25.