Restore proper spark in your vehicle with this ignition coil. Coil replacement will ensure a more efficient burn and promote fuel economy. Common symptoms of failing ignition coil(s) include: Engine shake loss of power decrease in fuel economy and possible ignition coil malfunction codes from your onboard diagnostics. Replacing your coils in pairs or all at the same time is recommended to ensure proper function and preservation of the new ignition coils. Comes with all components shown. This part is a direct OEM Replacement part and is ready for installation directly out of the box.** Factory Replacement Part that Meets or Exceeds Original Manufacturer Specifications for the Vehicles Listed.1999-2001 Porsche 911 3.4L H62000-2003 Porsche Boxster 3.2L H62000-2003 Porsche Boxster 2.7L H6