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⚡ Ignite your ride with NGK Iridium IX — where power meets precision.
NGK Iridium IX DCPR7EIX spark plugs deliver up to 3 horsepower gain with an ultra-fine iridium electrode that reduces voltage requirements and extends ignition life. Pre-gapped for easy installation and featuring advanced anti-corrosion metal plating, these plugs are engineered specifically for 1999-2016 Harley Davidson Twin Cam motorcycles, ensuring reliable, high-performance ignition every time.
| ASIN | B003BUCNNS |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #2,336 in Automotive ( See Top 100 in Automotive ) #6 in Automotive Replacement Spark Plugs |
| Brand | NGK |
| Brand Name | NGK |
| Compatible with Vehicle Type | Motorcycle |
| Core Material | Nickel |
| Customer Reviews | 4.7 out of 5 stars 4,931 Reviews |
| Included Components | NGK DCPR7EIX |
| Item Type Name | SPARK_PLUG |
| Item Weight | 0.09 Pounds |
| Manufacturer | NGK |
| Manufacturer Part Number | DCPR7EIX |
| Manufacturer Warranty Description | Manufacturer Warranty |
| Model Number | DCPR7EIX |
| Number of Items | 2 |
| Top Material Type | Metal |
| UPC | 700155016542 |
| Unit Count | 2.0 Count |
| Vehicle Service Type | Motorcycle |
J**C
Smooth Idle and Stronger Spark – Worth Every Penny
Installed these NGK Iridium IX DCPR7EIX spark plugs in my 1999–2016 Harley Davidson Twin Cam, and the difference was noticeable right away. The bike fired up quicker, idled smoother, and throttle response felt more crisp. NGK quality speaks for itself. The iridium tip is known for durability and a strong, consistent spark, and that’s exactly what you get. They feel like a premium upgrade over standard plugs, especially if you ride often or want dependable performance. Fitment was perfect, no issues with installation, and they came properly packaged as a matched pair. For the price, it’s a solid upgrade that improves reliability and performance without breaking the bank. If you’re running a Twin Cam and want better ignition performance and long service life, these are an easy 5-star choice.
K**D
We used NGK in our British bikes back in the 70s they worked best .
Great plugs . Work better than screaming eagle in my 103 roadking . Gap them at 35 because they are fine wire .
T**E
perfect , great price.
perfect , all worked just as it said . make sure you check the gap . they are not pre gapped.
R**S
Works
Works as it should
C**H
Harley spark plugs
Items as described and works well
B**G
Better than stock
Harley fires up quicker than using stock plugs
H**N
Great
Fit and finish is great. Stout and powerful plugs. Highly recommended.
R**T
spark plugs
Put these in my 1999 Harley Ultra. It fires off fast, sound great. When it reaches operating temp it idles at 900 rpm. I have an 04 throttle body and a S&S pcm w/02 sensors and S&S pipes that run under the frame like the new bikes. Not sure if the plug help lower the idle but it much nice at that rpm. The bike has other mods as well. I do HIGHLY recommend these spark plug.
B**6
Working as expected
OEM fit for Harley Davidson Fatboy 103 Ci twin cam engine. Smooth starting and running.
M**M
Harley-Davidson
Good update for my Harley
R**T
Good plugs
Just as good as the Harley ones. I feel no difference. Running these plugs now for 20k km.
M**O
Bujías de iridio para Harley davidson
Excelente calidad de producto, es lo que muestra y funciona excelente.
K**E
Good upgrade!
Arrived super fast and install was a breeze, really woke up my fz09!
Trustpilot
2 weeks ago
1 month ago