Didn’t expect any performance gains, but my OEM coils began to fail and even had some from rock auto that were garbage. These units are far superior, gave it a four star rating. One of the units had some residual material from the mold process, this prevented my OEM electrical connection from properly going on to the coil. This caused me to lightly file down the material and now everything works perfect and a proper connection. Had this been anyone else who is not as mechanically inclined, this could have caused a lot of headache and resulted in a returned item, and vehicle downtime.