Delivery time: approx. 2 - 5 working days

HKS Super Fire Racing Spark Plugs (50003-MR45XLZ) – For Hyundai i30N, Hyundai i20N & Suzuki Swift Sport ZC33S
Ultimate Ignition, Maximum Performance, Reliable Tuning

The HKS Super Fire Racing spark plugs type MR45XLZ (50003-MR45XLZ) are specially designed for performance cars that place higher demands on their ignition system. Perfectly suited for models such as the Hyundai i30N , Hyundai i20N , and the Suzuki Swift Sport ZC33S , these spark plugs ensure optimum combustion under high loads, higher compression and increased turbo pressure.

These high-performance spark plugs use a Ruthenium alloy , making them more durable and effective than traditional Iridium spark plugs. They are ideal for street use as well as track and tuning applications – up to and including Stage 3 tuning level .

Key benefits of the HKS Super Fire Racing MR45XLZ:

✅ Ruthenium Electrodes – More conductive than iridium, for a more powerful and stable spark
✅ High Ignition Reliability – Ideal for increased turbo pressure, higher compression and tuning
✅ Longer Lifespan – Up to 100,000 km, even with sporty use
✅ Better Throttle Response and Power – Optimal combustion, faster acceleration
✅ OEM Replacement with Performance Upgrade – Fits directly without modifications

Specifications:

• Type: HKS Super Fire Racing Spark Plug MR45XLZ

• Part Number: 50003-MR45XLZ

• Heat level: 9 (comparable to NGK 9)

• Material: Ruthenium center + nickel alloy outside

• Spark plug wrench: 14mm (hexagon)

• Electrode distance: Preset by HKS

• Quantity: 4 pieces recommended per engine (set not included unless otherwise stated)

Compatibility:

• Hyundai i30N 2.0T GDi (2017-present, VN & GP facelift)

• Hyundai i20N 1.6 T-GDi (2021-present)

• Suzuki Swift Sport ZC33S 1.4 Boosterjet (2017-present)

• Also suitable for other 4-cylinder turbo engines with similar requirements

Why are these spark plugs a must for tuning?

When your engine is tuned – for example with a Stage 1+, 2 or even 3 setup – the combustion temperature increases and the pressure in the cylinders rises. Standard spark plugs can then misfire, leading to loss of power, irregular idling or even engine damage. The HKS MR45XLZ prevents this thanks to its high ignition stability under extreme conditions.

In addition, the precise spark formation contributes to cleaner combustion and better efficiency, which not only increases power but also benefits fuel consumption under normal driving conditions.

The spark plug for your tuned N-Performance or ZC33S

Whether you drive sporty every day, regularly go to the track, or are simply looking for reliability and performance after a tuning upgrade: the HKS Super Fire Racing Spark Plugs MR45XLZ deliver. Directly replaceable, designed for top performance – and proven under extreme conditions.

🛠️ Give your i30N, i20N or Swift Sport the spark it deserves – order your HKS MR45XLZ set today!