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HKS Super Fire Racing M50HL Spark Plugs - Pack of 10

$300.00

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HKS Super Fire Racing M50HL Spark Plugs - Pack of 10

$300.00

$300.00

HKS Super Fire Racing M50HL spark plugs are engineered for high-performance engines that demand consistent ignition timing and durability under extreme cylinder pressures. These plugs are a critical upgrade for tuned or forced-induction vehicles where standard heat ranges cannot prevent pre-ignition. The M50HL features a cold heat range (equivalent to NGK 10), making it suitable for high-output applications that generate significant internal heat.

  • Manufacturer Part Number: 50003-M50HL
  • Series: Super Fire Racing
  • Heat Range: HKS 50 (NGK 10 Equivalent)
  • Thread Size: 12mm x 26.5mm
  • Hex Size: 14mm
  • Construction: 0.6mm Iridium alloy center electrode with a platinum ground electrode for increased longevity
  • Quantity: Pack of 10 plugs

Designed with a long-reach thread profile, these plugs ensure the electrode is positioned precisely within the combustion chamber for optimal flame kernel expansion. The copper-core design helps dissipate heat faster, reducing the risk of knock during high-load pulls. This 10-pack provides a complete ignition refresh for high-cylinder-count builds or multiple service intervals for 4 and 5-cylinder engines.

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