- Is the BR8EIX a direct replacement for a BR8ES?
- It uses the same 14mm thread, 0.75 in. reach and gasket seat, and the same heat range 8, so it fits the same applications. The iridium tip is the main difference.
- Is heat range 8 right for my engine?
- Heat range 8 is a cold plug, suited to high-revving or modified engines. A stock engine often calls for a hotter plug, so check the manufacturer's spec.
- How many plugs come in the box?
- One spark plug. A multi-cylinder engine needs one per cylinder, so order the number you need.
- Does it need gapping before installation?
- NGK sets the gap at the factory. Check it against your engine's spec and adjust only if needed, using a gap tool that won't damage the fine iridium tip.
- Does the resistor matter?
- Yes. The built-in resistor suppresses electrical noise that can interfere with radios and engine electronics, which matters on modern vehicles.
- How often should it be replaced?
- Iridium plugs last far longer than copper plugs, but follow your owner's manual interval. Inspect the plug if the engine starts misfiring or idling roughly.
- Where is the NGK Iridium IX Spark Plug (BR8EIX) cheapest?
- At Osburn's Family Business, for $9.00, 32% under what the other stores charge, as of our latest check.
- What do buyers say about the NGK Iridium IX Spark Plug (BR8EIX)?
- Rated 4.8 out of 5 from 399 ratings.
- Where can I buy the NGK Iridium IX Spark Plug (BR8EIX)?
- 21 stores we checked sell it, including MAPerformance, RZCrew, JDMuscle, Munro Industries, Munro Powersports.