NGK Spark Plugs

• Iridium IX: LFR7AIX heat range 7 (Subaru EJ25, Evo 9), BKR7EIX heat range 7 (Subaru EJ20, VW and Audi EA888), heat range 7 set of 4 (Evo 8 CT9A) and heat range 7 (Ford Focus RS LZ)
• Iridium for the Honda K20C1: 12mm extended reach iridium plug (Civic Type R FK8 and FL5)
• Laser Iridium: heat range 7 set of 4 (EJ25 WRX STI, Liberty GT, Forester XT) and ILKAR8H6 (FA20 WRX, Forester XT, Levorg)
• Racing: R7438-8 heat range 8 (Audi 2.5 TFSI DAZA)
• Double Platinum: PFR7B, a box of four OE-equivalent plugs

All parts for your car: WRX STI (GD), WRX STI (GR), WRX STI (VA), WRX (VA), Forester XT (SJ), Levorg (VM), Lancer Evolution VIII, Lancer Evolution IX, Civic Type R (FK8), Civic Type R (FL5) and Focus RS (LZ).

Browse every brand we supply on our brands page.

Spark plugs are chosen by engine code, heat range, thread reach and gap rather than by model year alone. Check the engine code on your car before ordering.

• Subaru: EJ20 (BKR7EIX), EJ25 in the WRX STI, Liberty GT and Forester XT (LFR7AIX or the Laser Iridium set), and FA20 in the WRX (VA), Forester XT (SJ) and Levorg (VM) (ILKAR8H6).
• Mitsubishi: 4G63 in the Lancer Evolution 8 and 9 (CT9A).
• Honda: K20C1 in the Civic Type R (FK8 and FL5), which uses a 12mm thread with extended reach.
• Volkswagen and Audi: EA888 (BKR7EIX) and the 2.5 TFSI DAZA (R7438-8).
• Ford: Focus RS (LZ) 2016 to 2017.

NGK's numbering counts upward as the plug gets colder, so a heat range 8 is colder than a 7. Several of the heat range 7 plugs listed here are one step colder than the factory plug, for tuned engines. Colder plugs shed heat faster and are often used on higher boost builds to reduce the risk of pre-ignition. Confirm heat range and gap for your combination with your engine builder or tuner, and check that the PFR7B matches your car's original plug specification.

Installation by a qualified professional is recommended. Spark plug replacement typically needs a spark plug socket with a rubber insert, an extension bar, a torque wrench and, on many turbocharged engines, removal of coil packs, covers and intake pipework.

Plugs should be gapped and checked before fitting, torqued to the manufacturer's specification, and installed into a cool engine to protect the cylinder head threads. Always follow the vehicle manufacturer's and NGK's fitting instructions.

Where can I buy NGK spark plugs in Australia?
Chicane Australia sells NGK Iridium, Laser Iridium, Racing and Double Platinum spark plugs and ships Australia-wide from the NSW Central Coast. Check your engine code and heat range, search by NGK part number, or contact our team for help choosing a plug for your build.

When should I go to a colder heat range spark plug?
As a general guide, many tuners step one heat range colder once an engine makes around 75 to 100hp more than standard (for example, from a 7 to an 8). A colder plug sheds heat faster, which helps stop the tip acting as a glow plug and causing detonation under high boost.

Which NGK plug suits the Subaru FA20?
The ILKAR8H6 Laser Iridium plug suits the FA20DIT in the WRX (VA), Forester XT (SJ) and Levorg (VM). It pairs a fine-wire iridium centre electrode with a platinum-tipped ground electrode for a slow wear rate.

Which NGK plugs suit the Subaru EJ25?
We list the LFR7AIX Iridium IX plug in heat range 7 and a set of four Laser Iridium plugs in heat range 7 for the EJ25 in the WRX STI, Liberty GT and Forester XT. The EJ20 uses the BKR7EIX.

What is the NGK R7438-8 racing plug for?
It is a Racing Series plug in heat range 8, with a fine-wire iridium centre electrode and platinum-tipped ground electrode, listed for the Audi 2.5 TFSI (DAZA) and aimed at high boost and competition use.