Take your Honda’s performance to the next level with the HKS MR45HLZ Super Fire Racing Spark Plug. This premium Ruthenium alloy plug is the definitive ignition upgrade for the Civic Type R (FK8/FL5) and the Civic RS/1.5T.
Featuring an NGK Heat Range 9 equivalent, the MR45HLZ is a "colder" plug designed to handle the increased cylinder pressures and heat of tuned, remapped, or track-driven K-Series and L-Series turbocharged engines.
Ruthenium Alloy Center Electrode: Superior to standard Iridium, Ruthenium provides a higher melting point and better oxidation resistance. This ensures a more stable spark and a significantly longer service life in high-compression GDI engines.
Projected Tip Design (Z-Type): Engineered with a 2mm protrusion to match the specific ignition position required by modern Honda performance heads, ensuring optimal flame spread.
0.6mm Ultra-Fine Electrode: Reduces the voltage required for ignition, leading to sharper throttle response, smoother idling, and more reliable high-boost performance.
Platinum Ground Electrode: Features a square platinum chip for extreme durability and consistent gapping under heavy racing loads.
Thermal Edge Technology: HKS’s signature ceramic design helps discharge carbon deposits, preventing misfires during extended idling or cold starts.
| Attribute | Detail |
| HKS SKU | 50003-MR45HLZ |
| Plug Type | MR-Series (Ruthenium / Protrusion) |
| Heat Range | NGK #9 Equivalent (Cold) |
| Thread Size | $\phi 12 \times 26.5\text{mm}$ |
| Wrench Size | $14\text{mm}$ |
The MR45HLZ is a specialized fitment for:
Honda: Civic Type R (2017-2021 FK8 / 2022+ FL5)
Honda: Civic RS / VTi-L / Hatch (2016+ 1.5L Turbo L15B/L157)
Honda: Accord / CR-V (Select 1.5L Turbo models)
Acura: Integra Type S (DE5)
Purchasing Note: Spark plugs are sold individually in Australia. For a Honda Civic Type R or 1.5T engine, please order Quantity: 4.
$795.00
$795.00
$760.00
$1,999.00
$6,995.00
$40.00
$132.00