



⚡ Ignite your ride with race-grade spark tech!
The HKS 50003-M45XL M-Series Super Fire Racing Spark Plug features a 0.6mm iridium alloy center electrode and a platinum chip outer electrode designed for enhanced ignition performance and durability. Its anti-vibration shortened outer electrode and Thermal Edge ceramic insulator reduce carbon buildup and misfires, ensuring smoother, more responsive engine performance ideal for rotary applications.
| ASIN | B003THZK5Q |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #71,874 in Automotive ( See Top 100 in Automotive ) #375 in Automotive Performance Spark Plugs |
| Brand Name | HKS |
| Compatible with Vehicle Type | Car |
| Core Material | Iridium |
| Customer Reviews | 4.6 4.6 out of 5 stars (130) |
| Gap Size | 0.6 Millimeters |
| Global Trade Identification Number | 04957266720431 |
| Included Components | Main component only |
| Item Weight | 10 Grams |
| Manufacturer | HKS |
| Manufacturer Part Number | 50003-M40G |
| Model Number | 50003-M45XL |
| Thread Size | Fourteen millimeters by Nineteen millimeters |
| Top Material Type | Metal |
| Unit Count | 1 Count |
S**N
Original
❤️very nice 👍🏼
R**1
Switched to these HKS spark plugs and wow — my car runs smoother and feels more responsive. Easy to install and they hold up great even when I push the engine hard. Definitely a solid upgrade if you want better performance without breaking the bank. Highly recommend!
R**N
Just received my "brand new spark plug" I ordered... Opened the box and found this in it... a used NGK plug.. this is unreal.
T**.
High quality and just as expected. Excellent spark plugs for a tuned 2020 veloster N. easy install just need a 10mm and spark plug socket
D**K
Great high horsepower plug. Works in the bi turbo M157 motor with a tune. Keeps things cooler and happy. More durable than oem when tuned.
C**.
Good item
Trustpilot
5 days ago
3 weeks ago