Bosch is a recognized leader in fuel systems technology, with more than 45 years of gasoline injection system experience. With production exceeding 1 billion fuel injectors, Bosch is the number one name in original equipment (OE) injectors. Bosch Fuel Injectors offer many advantages, including: Eliminating vapor leakage, Reducing CO2 emissions, and Increasing engine output. Manufactured with the highest quality, high-alloy steels and plastic coverings for optimum corrosion resistance, Ethanol fuel (E100) capability, and longevity. Optimum spray patterns ensure perfect mixture generation and efficient combustion - even for dynamic driving - and deliver new-car smoothness and drivability. form, and function, and include both top and bottom mounting O-rings, so they are ready to install right out of the box.