NGK Iridium Spark Plug DCPR8EIX for Indian Chieftain Dark Horse 2016-2018 — Single OEM-Grade, Long-Life

NGK is a global leader in ignition technology and this DCPR8EIX iridium spark plug matches the original equipment specifications used on many modern motorcycles. Designed for consistent spark performance and extended durability, this plug is sold individually so you can replace only what you need or keep a spare on hand. Verify fitment with your bike’s engine code and quantity requirements before ordering.

How does this NGK iridium plug improve ignition consistency?

The iridium fine-wire center electrode offers a stable, high-intensity spark that promotes more complete combustion than conventional plugs. Iridium is harder and more erosion-resistant than nickel, which helps the electrode maintain its profile over longer mileage and maintains gap stability for consistent firing.

• Fine iridium center electrode for precise spark delivery
• Reduced electrode wear for longer service intervals
• Stable spark under varied throttle and load conditions

Will this part fit my Indian Chieftain Dark Horse 2016–2018?

This listing is for the NGK DCPR8EIX spark plug, which is commonly specified for the Indian Chieftain Dark Horse ABS model years 2016–2018. Always cross-check your motorcycle’s engine and OEM part number using NGK’s online application tool or your service manual to confirm compatibility and required quantity.

• Matches common OEM specifications for listed years and model
• Sold individually so you can replace one plug or more as needed
• Check NGK application charts or dealer records before purchase

How long can I expect this iridium plug to last compared to standard plugs?

Iridium plugs typically last significantly longer than conventional nickel plugs due to the metal’s superior hardness and resistance to erosion. While lifespan varies with riding style and engine conditions, iridium plugs commonly achieve higher mileage before replacement is needed, helping reduce maintenance frequency.

• Iridium construction resists wear for extended gap life
• Fewer replacements compared to standard plugs under normal use
• Actual service life depends on tuning, fuel quality, and riding habits

How should I install and gap this spark plug for the best results?

NGK DCPR8EIX is manufactured to a standard factory gap, but always inspect and set the gap to your motorcycle manufacturer’s specification before installation. Use a torque wrench to tighten to the recommended value and apply anti-seize sparingly if your workshop manual advises it.

• Confirm and adjust gap per Indian service manual
• Tighten to specified torque to avoid damage or misfit
• Replace spark plug wires/boots if cracked or worn for best performance

Who is this for? This NGK DCPR8EIX iridium spark plug is intended for Indian Chieftain Dark Horse owners, motorcycle technicians, and riders who want an OEM-equivalent replacement with longer service life. It's also suitable for anyone maintaining a single-cylinder or V-twin configuration that lists this part number—especially riders seeking reliable ignition performance and reduced maintenance intervals. Remember to confirm exact application and the number of plugs required for your specific engine before purchasing.