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⚡ Ignite your ride with NGK Iridium IX – where power meets precision!
NGK Iridium IX DCPR7EIX spark plugs are engineered for 1999-2016 Harley Davidson Twin Cam motorcycles, delivering up to 3HP performance gains. Featuring a 25% smaller iridium electrode for reduced voltage needs and longer ignition system life, these plugs come pre-gapped and sport enhanced anti-corrosion metal shell plating for durability. Trusted by riders for smoother idling, faster starts, and reliable throttle response.
| ASIN | B003BUCNNS |
| Best Sellers Rank | #14,831 in Automotive ( See Top 100 in Automotive ) #72 in Automotive Replacement Spark Plugs |
| Brand Name | NGK |
| Compatible with Vehicle Type | Motorcycle |
| Core Material | Nickel |
| Customer Reviews | 4.7 4.7 out of 5 stars (4,805) |
| 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 |
| Thread Size | 12mm |
| Top Material Type | Metal |
| UPC | 700155016542 |
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.
J**E
Good Spark Plugs
Plugs came gapped correctly for the standard range on an 05 Road King. They fit without issue
W**S
Great plugs
Perform well in my 2011 Harley FLHTK 103. No issues with fitment, look good, good value, bike start after install.
R**K
Right plug for bike
Perfect for my bike, came fast gaped @ 40 . Bike is running better, I will see how long they perform
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.
I**.
new life into an old bike.
Put them in my 1200 Sportster xlc 2002. Along with a new air filter, made my bike run like a champ. A consistent idle and great acceleration..
A**N
Excellent Spark Plugs!
I bought these spark plugs for my 2007 Harley-Davidson Softail Night Train (FXSTB). They fit perfectly! The price is for a pair (2 plugs) — very convenient and affordable. After installation, the motorcycle started instantly and runs smoothly and quietly. I’m very happy with this purchase and highly recommend these plugs to all Harley owners — great quality for a fair price!
B**N
Good plugs
Stronger burn. Love them
B**6
OEM fit for Harley Davidson Fatboy 103 Ci twin cam engine. Smooth starting and running.
M**M
Good update for my Harley
R**T
Just as good as the Harley ones. I feel no difference. Running these plugs now for 20k km.
M**O
Excelente calidad de producto, es lo que muestra y funciona excelente.
K**E
Arrived super fast and install was a breeze, really woke up my fz09!
Trustpilot
1 week ago
2 weeks ago