Iridium Spark Plug Set - ST

3

£56.00 Inc. VAT
£46.67 Ex. VAT

EcoBoost engines running substantially higher boost pressure or increased levels of tuning compared to the OE power output 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. Using spark plugs that are optimised for increased power ensures maximum performance.

Extensive in-market validation at extreme boost / cylinder pressures was undertaken to ensure optimal performance was achieved, whilst also making sure  reliability and drivability wasn't compromised in colder ambients.

Each set is supplied pre-gapped by mountune to optimise the setting and allow for easier end-user installation. 

The NGK LTR71X-II is one step colder than the original spark plug.

Applications:
Focus ST 2013-2017
Features:
  • Smoother acceleration
  • Perfect for high boost applications
  • Supplied pre-gapped by mountune

Please note: Supplied in a pack of 4 plugs.


Customer Reviews

5 Based on 3 reviews
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S
28/05/2019
Steve

Pulls harder and stronger

Wow im amazed. Can highly recommend for any one running a good stage 1 tune with higher than stock boost. A noticeable difference with a harder faster and importantly smoother revs. I would go so far as to say it puts the power down smoother and better too. Maybe not nessassary on stock cars.

Steve  verified customer review of Iridium Spark Plug Set - ST
A
14/03/2019
Anonymous
United Kingdom

Mountune

Very good service and the delivery was so fast and on time a very good product to

MF
14/03/2019
Mark fisher

Plugs

These plugs are absolutely brilliant Made the car run so much smoother and the idling is a lot better not up-and-down like it was before highly recommend


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