Great quality and best option for spark plugs out there for an easy upgrade. They even come pre gapped and packaged safely to keep the gap to save you the hassle.

older NGK plugs had a center copper electrode that protruded out of the ceramic, and two ground electrodes. the center electrode would erode near the bottom, visibly after 15k miles. these new plugs use surface discharge and four grounds. this will probably make them more durabe, but i still plan on changing them at 15-20k depending on how much track the car sees. idle definetly improves after replacing 20k mile copper spark plugs.

Did job as needed, packaging was really well done too by both manufacturer as well as FCP.

Replaced Bosch FGR7DQP spark plugs … had BMW Bosch written on plugs … 4th owner … potentially OEM plugs/coils on 16 year old car. I replaced all spark plugs/ignition coils and my 06 BMW 330Ci convertible with multiple cylinder misfire fault codes (P0305 - Cylinder 5 misfire, P0300 - Random/Multiple Cylinder Misfire at 78K miles) is purring like a kitten. I moved coil 5 to 1 while troubleshooting and suddenly P0301 and P0302 had pending faults detected along with the previous codes. All codes are clear now … used BAFX OBDII reader and Torque wireless Bluetooth app on phone.