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HKS engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full HKS lineup with fast shipping and expert fitment support — order with confidence.
The HKS Super Fire Racing M40LF spark plug is engineered for enthusiasts demanding peak ignition efficiency. Designed to handle high-boost applications and increased cylinder pressures, these plugs feature a high-grade iridium center electrode that ensures a stable, powerful spark under extreme conditions. Whether you are hitting the track or upgrading your daily driver, the M40LF provides the reliability and performance consistency required for high-performance tuning.
By upgrading to HKS Super Fire Racing plugs, you reduce the risk of misfires during high-RPM operation, ensuring your engine reaches its full potential. The advanced materials used in the M40LF construction offer exceptional resistance to wear, extending service intervals even in modified engines. Experience smoother idling and crisper throttle response with this premium ignition component. Find your next performance upgrade at GGCRACING.
| Brand | HKS |
|---|---|
| Manufacturer part number | 50003-M40LF |
| GGC SKU | HKS50003-M40LF |
| UPC / GTIN | 4957266720417 |
Use the manufacturer part number when you compare with other listings or ask us to confirm a match.
| Box size | 5 × 4 × 2 in |
|---|---|
| Shipping weight | 1.2 lb |
Universal fit — check measurements. Compare the dimensions and specifications on this page with your application before you order.
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