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Motorcraft Spark Plug Set - SP-550 Focus ST & RS
Motorcraft Spark Plug Set - SP-537 Focus ST


 
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Product Code: SP-537
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Description
 

Motorcraft Spark Plug Set of 4 - SP-550


SP-550

Focus ST 2013-2018
Focus RS 2016-2018

The EcoBoost engine operates under extreme conditions including high cylinder pressures. The spark plugs are subject to rapid wear rates, even at standard performance levels. Engines running higher boost points or increased levels of tuning can experience reduced spark plug life resulting in lower engine performance, misfires and rough idle. Increased wear is typically seen in the form of increased spark plug gap and degradation of the electrode.

For optimum power and performance we use genuine Ford Iridium spark plugs and replace them every 10,000 – 12,000 miles.

For standard engines and mountune performance upgrades, we recommend and use standard heat range spark plugs. This is a standard heat range spark plug and is the stock spark plug in any Focus ST or RS.

  • Genuine Ford Motorcraft
  • Iridium
  • Pre-gapped

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 18 Write a review »

  0 of 0 people found the following review helpful:
 
5 of 5 First Set Since Factory July 29, 2020
Reviewer: Aaron O from medina, WA United States  
This is my first set of spark plugs since my ST left the factory. All plugs are pre-gapped  as promised (between .024 - .025). Mountune is the way to go for OEM replacement plugs.

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  0 of 0 people found the following review helpful:
 
5 of 5 Pre-gapped and clean install July 12, 2020
Reviewer: clark vaughn from Mission Viejo, CA United States  


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  0 of 0 people found the following review helpful:
 
5 of 5 Definitely the proper spark plugs July 9, 2020
Reviewer: Shane from Huntsville, AL United States  
Car runs better than it has in about 6 months. Tuned cars need to change their spark plugs once a year and I order mine from mountune every year.

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  0 of 0 people found the following review helpful:
 
5 of 5 High quality May 31, 2020
Reviewer: Frank Sanchez from Buckeye , AZ United States  
Second time buying them and always pre-gapped to spec.

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  0 of 0 people found the following review helpful:
 
5 of 5 Spark Plugs August 26, 2019
Reviewer: Benjamin Hollick from Los Angeles, CA United States  
I needed spark, they make spark.  Sweet.

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