JavaScript seems to be disabled in your browser.

You must have JavaScript enabled in your browser to utilize the functionality of this website. Click here for instructions on enabling javascript in your browser.

This is the OEM NGK One Step Colder Spark Plug found in the VQ35DE Engine. 

  • PLFR5A-11 - Factory Heat Range (5) is best for vehicles without any modifications
  • PLFR6A-11 - One Step Colder (6) is best to be used when any engine modifications have been done (Including air intake, exhaust, etc.)


  • 2003-2006 Nissan 350Z
  • 2003-2007 Infiniti G35 Coupe
  • 2003-2006 Infiniti G35 Sedan
  • 2003-2008 Infiniti FX35

Available Options:



Reviews Ask A Question About This Product

Questions our customers have asked...

Would these spark plugs come pre gapped?

Response: Yes they will come pre gapped within OEM specs.

What's the difference between the PLFR5A-11 and PLFR6A-11 are they gap differently ?

Response: The gap is the same the difference is in the porcelain, and thus temp rating of the plug. We make these choices based on the power adders of a car. If you have questions regarding what is the right selection plug just give us a call.

Customers who bought this product also purchased