Lh Jetronic Fuel Pressure Regulator 928 1987 1991 907 423 01 00 07 This specialized formula uses a 64455932140 This specialized formula uses a high percentage of micro fine copper flakes in a semi synthetic grease carrier and includes high quality rust and corrosion inhibitors for added protection Valve Control (Non PSE): Includes a complete valve controller kit with detailed instructions for non Porsche Sport Exhaust equipped vehicles This critical component maintains optimal fuel pressure to ensure consistent engine performance Essential maintenance part for enthusiasts committed to keeping their classic Porsche running at its best