Direct Injection vs. Port Injection

Port fuel injection (PFI) sprays fuel into the intake port ahead of the intake valve. Injectors are lower-pressure, easier to service, and used by most engines from the mid-1980s onward.

Gasoline direct injection (GDI) sprays fuel directly into the combustion chamber under very high pressure. Injectors are more complex mechanically, more expensive, and are matched precisely to the engine's fuel-delivery calibration.

Confirm which system your engine uses before ordering — the two are not interchangeable.