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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: 14 Write a review »

  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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  0 of 0 people found the following review helpful:
 
5 of 5 May 15, 2019
Reviewer: Peter Goyer from Whitehouse Station, NJ United States  


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  0 of 0 people found the following review helpful:
 
5 of 5 April 24, 2019
Reviewer: Anonymous Person from Attleboro, MA United States  


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  0 of 0 people found the following review helpful:
 
5 of 5 perfect gap February 5, 2019
Reviewer: Adam Clump from Jerome, AZ United States  
They are OEM plugs that work perfectly fine. The gap was perfect, super easy install

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  0 of 0 people found the following review helpful:
 
4 of 5 SP-537 plugs January 20, 2019
Reviewer: Ian Perry from Christchurch, Canterbury New Zealand  
Measured the Gap at over 0.28. Closed the gap up to 0.26 thou and fitted.

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