2002-2004 Honda Odyssey 3.5L. 2003-2004 Honda Pilot 3.5L. 1 x Fuel Pressure Regulator as the first picture shows. Stable Regulation o f Fuel Pressure Ensures That The Fuel Is Supplied t o The Engine a t An Appropriate Flow Rate, Providing A Stable Fuel Mixture Ratio, Thereby Ensuring Normal Engine Operation a nd Combustion Efficiency.