NGK Iridium Spark Plug

NGK Spark Plugs · Part number IZTR5B11 · NZ$52.00 incl. GST

For those roaring V8s in your classic Holden Commodore SS and HSV GTO, spark plugs are absolutely crucial for getting that perfect bang every time, ensuring you've got all the grunt you need and your fuel economy stays sweet.

Price

NZ$52.00 including GST. Part number IZTR5B11.

Fits these vehicles

• Chevrolet Camaro (1998–2002)
• Chevrolet Corvette (1997–2004)
• Chevrolet Corvette (2004–2013)
• Chevrolet Corvette (2008–2013)
• Elfin MS8 Clubman (2005–2010)
• Elfin MS8 Streamliner (2005–2010)
• HDT Commodore (2006–2013)
• HDT Commodore (2006–2013)
• HDT Commodore (2006–2013)
• HDT Commodore (2006–2013)
• HDT Commodore (2006–2013)
• Holden Adventra (2003–2004)
• Holden Adventra (2004–2007)
• Holden Adventra (2004–2007)
• Holden Berlina (2002–2004)
• Holden Berlina (2002–2004)
• Holden Berlina (2002–2004)
• Holden Berlina (2004–2005)
• Holden Berlina (2004–2005)
• Holden Berlina (2004–2005)
• Holden Berlina (2004–2005)
• Holden Berlina (2005–2006)
• Holden Berlina (2005–2006)
• Holden Berlina (2005–2006)
• Holden Berlina (2006–2007)
• Holden Berlina (2006–2008)
• Holden Berlina (2006–2013)
• Holden Berlina (2008–2013)
• Holden Calais (2003–2004)
• Holden Calais (2004–2006)
• Holden Calais (2005–2006)
• Holden Calais (2006–2013)
• Holden Calais (2008–2013)
• Holden Calais (2009–2013)
• Holden Calais (2009–2013)
• Holden Calais (2013–2015)
• Holden Calais (2013–2015)
• Holden Calais (2015–2017)
• Holden Calais (2015–2017)
• Holden Caprice (2006–2006)

Description

Spark Plug Swap: Keep Your V8 Roaring Like a Dream! — Featuring NGK
> Right, let's talk spark plugs! These little beauties are the heart of your petrol engine, kicking off that perfect explosion of air and fuel. Especially in those beastly V8s like your Holden Commodore or HSV, knackered or gunked-up plugs can turn your smooth ride into a lumpy mess, gutting your power and guzzling your petrol, particularly when you put the pedal to the metal. Don't let your V8 miss a beat!
Symptoms That Led You Here
• Engine misfires or rough idling, particularly noticeable in powerful V8 engines.
• Reduced acceleration and overall engine performance.
• Increased fuel consumption.
• Difficulty starting the engine.
• Check Engine Light (CEL) illumination, often indicating a misfire code.
Will it pass WOF?
Yes, a vehicle with failing spark plugs may fail a WOF due to excessive emissions, rough idling, or engine misfires that indicate a poorly running engine. Efficient combustion is essential for WOF compliance.
DIY or Workshop?
Difficulty: 6/10 (for V8 engines, accessibility can be challenging)
Estimated Time: 1-3 hours, depending on engine access and number of cylinders.
Tools Required: Spark plug socket set (specific size for your plugs), ratchet, extension bars, torque wrench, spark plug gap tool (if not pre-gapped), dielectric grease, anti-seize compound.
Expert Recommendation
Bob @ CARFIX always recommends replacing spark plugs at the manufacturer's specified intervals or sooner if symptoms arise, especially in performance vehicles where optimal ignition is paramount. The NGK spark plug (SKU IZTR5B11) is an excellent choice for the specified Holden and HSV V8s, known for its durability and consistent performance. Bob @ CARFIX is always on hand to help you work out exactly what part you need for your V8 muscle car. Make sure you head over to Bob's Shop for a chat!
Fitment Notes
This specific spark plug is designed for a range of high-performance V8 engines, including those found in the HOLDEN COMMODORE i SS, SS-V (2015-2017), HSV GTO i V8 (2003-2004), ELFIN MS8 STREAMLINER i V8 (2005-2010), and various other Holden Calais, Crewman, and Hummer models. Always double-check the specific engine code and year to ensure correct fitment, as V8 engines can have subtle variations in spark plug requirements.

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🛠️ Bob's Pro Tip: Do the Job Right!
> If you're replacing this spark plug, make sure you've got the right workshop prep, protection, and safety gear ready. Taking a bit of extra time and using the proper safety stands and cleaners makes all the difference for a professional result!

🧰 What Else You'll Need:
• Safety First: Always secure your vehicle on heavy-duty safety jack stands before working underneath. Never rely solely on a hydraulic jack.
• Clean Hands: Keep a pack of Nitrile Gloves handy to protect your skin from grease, oils, and chemical sprays.
• Preparation: Have microfibre towels and a suitable parts cleaner nearby to keep components clean during installation.