NGK R5671A-9 V-Power Racing Spark Plugs Set of 4 for Mazda MX-5 NA NB

£17.57 inc. VAT

NGK R5671A-9 V-Power Racing Spark Plug for Mazda MX-5 NA NB × 4

£4.39 inc. VAT each

8 in stock

Upgrade your Mazda MX-5 NA or NB with NGK R5671A-9 V-Power Racing spark plugs. This set of 4 plugs is engineered for performance, providing stronger spark energy, improved combustion, and enhanced throttle response. Perfect for high-performance and track use, they ensure optimal engine power under extreme conditions. Designed for reliability and durability, they are a great choice for motorsport enthusiasts looking to get the most out of their MX-5. Suitable for both NA and NB models.

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 power, the cylinder’s heat and pressure increase; changing to a colder spark plug reduces the heat on its surface, which can become a hot zone and cause detonation. Depending on your specific application, you can move up to four ‘steps’ colder with these plugs.

R5671A spark plugs are pre-gapped to 0.8mm.

Plug Steps colder
R5671A-10 4
R5671A-9 3
R5671A-8 2
R5671A-7 1

Additional information

Model

Mk1 (89-98), Mk2 (98-05)

NGK R5671A-9 V-Power Racing Spark Plug for Mazda MX-5 NA NB

Shipping Weight 0.048 kg
Shipping Dimensions 9 × 2.5 × 2 cm
Model

Mk1 (89-98), Mk2 (98-05)

Warranty information

Warranties cover defects in materials and workmanship only. Warranty is for replacement of a similar product, repair of the original product or refund of the purchase value only and excludes all labour and incurred charges including towing, fitting, inconvenience, and purchases of other manufacturer's products. The warranty is good for the period stated in the additional info tab from the date of purchase. Mileage warranties are for road use only and proof of mileage is required. Products must be installed by an independent experienced professional mechanic and the suspected defect must be present at the outset. The warranty does not cover damage caused by incorrect installation, failure to comply with the maintenance requirements of the vehicle, processing or otherwise changing the product, ordinary wear and tear, or any other external influences. Warranties are invalid if the product is used for racing, rallying, drifting, track days or any other form of motorsport or competition. Please refer to the manufacturer's own warranty documentation for more information.

Making a warranty claim

Proof of purchase receipt showing the date of purchase, proof of mileage at installation, proof of current mileage and invoice of the work undertaken by an independent experienced professional mechanic must be supplied along with the returned products for a warranty claim to be considered. If your vehicle needs to be used whilst your warranty claim is considered replacement parts from the same manufacturer should be purchased through BOFI Racing. In the event of a successful warranty claim, we will refund the card that was originally used to purchase the replacement parts, in full or in part depending on the nature of the claim. BOFI Racing reserves the right to make full or partial compensation at its sole discretion depending on the condition and mileage use of the returned suspect parts. For example, if you have used the part for several thousand miles before a defect is noticed, only partial compensation may be offered.