Aftermarket injector nozzles
 

I was wondering why they sell injectors and just injector nozzles? What's the difference? Do you have to have both of them?

The nozzle is the very tip, and it is the main contributor to how much fuel is delivered. Selling full injectors is the easiest, as you pull one out, and install the new one with new sealing hardware. Nozzles involved more labor and tools to replace. If your injector bodies are good, and you have the tools, changing nozzle is cheaper. Setting the pop pressure in the injectors is highly recommended, and requires special tools to do so as well.

Alright cool. Thanks man