Optimizes fuel combustion efficiency to save fuel consumption. For Nissan For Primera 2002/03-2008/12 P12 1.8,Material:ABS+Metal,Our automotive fuel injectors use advanced technology, which can inject fuel accurately to ensure the best in fuel economy and engine. Package Contents:4 x Fuel injector ,Porous fuel injectors allow quick starts in cold environments. Reduced flow fluctuations for precise fuel control. Our fuel injectors have more complete atomization and combustion, greater power, more economical, more stable acceleration, smoother shifting, less knocking. Effectively reduces engine exhaust emissions., Manufacturer: NMJLQW