The Nismo 740cc side-feed high flow injectors are a direct fit replacement of the stock injectors. They will fit straight into the original fuel system with no modifications.
If you're increasing power through the engine you NEED to pump more fuel. The standard injectors cannot provide enough amount of fuel for engine so upgrading to the 740cc NISMO injector will provide the additional fuel needed.
When upgrading your injectors, the ECU will need to be reprogrammed for the higher rate of fuel delivery.
This page is for a pack of six injectors.
Ordered from Japan, expect 2-4 week wait.