NGK R5671A V-Power Racing Forced Induction Spark Plugs For Mazda MX-5 NA & NB

NGK R5671A V-Power Racing Forced Induction Spark Plugs For Mazda MX-5 NA & NB

£14.63

(2 customer reviews)
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NGK R5671A V-Power Racing Forced Induction Spark Plugs For Mazda MX-5 NA & NB

Supplied as shown, the price is for a set (4) spark plugs.

Get the best spark you can out of your ignition system with these resistorless race spark plugs, we run these on our personal cars and find they respond very well, benefiting from improved throttle response and less spark blowout issues at higher boost levels.

When turbocharging or adding any form of forced induction to an engine, care needs to be taken around controlling detonation of the mixture. As you build more and more power the heat and pressure in the cylinder increases; changing to a spark plug that is ‘one step colder’ reduces the heat at the surface of the spark plug, which can become a hot zone and a cause of detonation. Depending on your specific application, you can move up to four ‘steps’ colder with these plugs.

Plug(R5671A) Number of steps
R5671A-10 4
R5671A-9 3
R5671A-8 2
R5671A-7 1

These are all pre-gapped at 0.8mm.

Copper plugs provide the best conduction, they are easily gapped without damage and don’t foul as easy – that’s why we recommend them over the much more expensive iridium plugs

Additional information

Weight 0.195 kg
Dimensions 10.5 × 9 × 2.5 cm
Brand

NGK

Plug

10 (4 Steps), 9 (3 Steps), 8 (2 Steps), 7 (1 Step)

2 reviews for NGK R5671A V-Power Racing Forced Induction Spark Plugs For Mazda MX-5 NA & NB

  1. jamestbowman

    I had an issues with these causing my laptop to disconnect from my me221 gen2. Changed to the BKR7E plugs and problem solved.

  2. Alison (verified owner)

    Had the same issue as above. Causes an issue with me221 ecu so cannot do logging.

    Was a nightmare to map on rr as keeps disconnecting laptop too.

    No issues running the car though. It’s literally just not comparable with the laptop connection

    • Daniel Marshall

      Hi There,

      What we have found with these plugs is they impact early cars (1.6 chassis) far more than later ones. A good fix is to add an additional ground from the engine to the chassis.

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