4 Bar Fuel Pressure Regulator: 4 Bar Fuel Pressure Regulator: When ra ing boost higher than stock setting original 3-bar regulator might not feed enough fuel. To be safe we always recommend to upgrade to 4bar ? call it cheap insurance. Application: Beetle / Golf & Jetta 1.8t
ABD/Bosch Racing VW MK4 4 Bar Fuel Pressure Regulator: ABD/Bosch Racing 4 Bar Fuel Pressure Regulator When ra ing boost higher than stock setting original 3-bar regulator might not feed enough fuel. To be safe ABD Racing always recommend to upgrade to 4bar. Call it cheap insurance. Application: Beetle / Golf & Jetta 1.8T