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SKU: 50003-M40XL-1
HKS M-Series Spark Plug (Heat Range 8) – Single (for 2010 Hyundai Genesis Coupe 3.8L)
The HKS M-Series Spark Plug (Heat Range 8) is a high-performance ignition upgrade designed for the 2010 Hyundai Genesis Coupe with the 3.8L V6 engine. Engineered with HKS’s advanced M-Series technology, this spark plug features a special electrode design and high-heat-range construction that delivers a stronger, more consistent spark under high RPM and boosted conditions. The colder heat range (8) helps prevent pre-ignition and detonation in performance or modified engines while maintaining excellent combustion efficiency. Ideal for street, track, or tuned applications, this single plug is a direct replacement that improves throttle response, power delivery, and overall engine reliability. Sold individually, it is perfect for replacing a single worn plug or completing a full set.
Key Features
- M-Series Technology – Advanced electrode design for stronger spark and improved combustion
- Heat Range 8 – Colder rating ideal for high-performance and modified 3.8L engines
- High RPM Capability – Excellent performance under demanding conditions
- Direct Replacement – Fits factory spark plug locations with no modifications required
- Single Plug – Sold individually for targeted replacement or full set completion
| Spec | Detail |
|---|---|
| Part Number | 50003-M40XL-1 |
| Brand | HKS |
| Type | M-Series Spark Plug (Heat Range 8) |
| Compatibility | 2010 Hyundai Genesis Coupe 3.8L V6 |
| Heat Range | 8 (Colder than stock for performance applications) |
| Country of Origin | Japan |
| Warranty | HKS Limited Warranty |
Whats Included
- One HKS M-Series Spark Plug (Heat Range 8)
Product Notes
- Designed specifically for the 2010 Hyundai Genesis Coupe 3.8L V6 engine
- Colder heat range helps prevent detonation in tuned or high-boost applications
- Professional installation and proper gap setting recommended
Installation Notes
- Direct replacement for factory spark plugs
- Estimated time: 30–60 minutes for a full set
- Gap to manufacturer specifications and use anti-seize on threads
This Part Fits
| Year Range | Make | Model | Trim / Engine | Notes |
|---|---|---|---|---|
| 2010 | Hyundai | Genesis Coupe | 3.8L V6 | M-Series Spark Plug (Heat Range 8) – Single |
Why Choose HKS M-Series Spark Plugs?
- Advanced design delivers stronger spark and better combustion efficiency
- Colder heat range ideal for performance and modified engines
- Trusted Japanese engineering for reliability under high RPM and boost
Frequently Asked Questions
-
Q: Is this spark plug suitable for my tuned 2010 Genesis Coupe 3.8L?
A: Yes, the Heat Range 8 is ideal for modified or high-boost applications to prevent detonation. -
Q: How many plugs do I need?
A: The 3.8L V6 requires 6 plugs total. This listing is for a single plug. -
Q: Is gapping required?
A: Yes, gap the plug to the manufacturer’s recommended specification before installation.
Shipping & Handling
- Method: Ground UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Official HKS retail packaging
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