[go_a_way1]

Originally Posted by Torry@HKSUSA

A full list of our plugs is here: http://www.hksusa.com/spark-plugs-1/

The stock FR-S plug replacements are 50003-M45HL.

Awesome! Thanks for the quick reply!! Now what benefits do your spark-plugs offer vs OEM? I noticed that the OEM plugs have the 3 prongs and yours looks like a traditional 1 prong? And they are both iridium tip as far as I can tell.