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NGK race spark plugs

NGK race spark plugs

Regular price $22.99 USD
Regular price Sale price $22.99 USD
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Emissions: Emissions do not apply.

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Warranty: 60 days

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If you're running high boost, these are the plugs to have. They don't have an internal resistor so 100% of the spark energy goes into the arc. We've seen these solve high-boost misfire problems on 400 hp cars. You'll be able to run a bigger gap, which means a bigger spark and more power. It's the cheapest ignition upgrade you can get.

What's the downside? In theory, more ignition noise in your stereo. We haven't actually experienced that nor have we received any reports of problems from our customers. But you have been warned. You might also get a little burble at idle. These are a heat range 7 which is great for high power, but are going to be more prone to fouling if the car has starting problems. We used to run #7 plugs in all our turbo cars until a few years ago.

For 1990-05 Miatas. Works well in conjunction with our Big Spark kit. Not compatible with the old Link ECU. Sold in sets of four - that's enough for one full car.

NGK R5671A-7

Customer Reviews

Based on 1 review
Mark N.

My '99 Miatas always had a slight hesitation when getting on the gas around a corner. The plugs were OEM Mazda plugs. THE HESITATION IS COMPLETELY GONE NOW! Engine runs very smoothly. Maybe it is wishful thinking, but it seems to have a bit more oomph, more liveliness. I've only had them in for a couple of days, but the difference is noticeable. Will it improve gas mileage? I hope so, with gas at $6 a gallon, but time will tell. Nonetheless, the improvement in performance is worth every penny of this modest cost improvement.