NGK Platinum Spark Plug

NGK Spark Plugs · Part number PFR6B · NZ$48.00 incl. GST

For your zippy Subaru Impreza WRX, Nissan 180SX Turbo, or a Euro sports sedan.

Price

NZ$48.00 including GST. Part number PFR6B.

Fits these vehicles

• Alfa Romeo 146 (1997–2000)
• Alfa Romeo 147 (2003–2010)
• Alfa Romeo 156 (1997–2002)
• Alfa Romeo 156 (1997–2003)
• Alfa Romeo 156 (2000–2005)
• Alfa Romeo 156 (2002–2005)
• Alfa Romeo 156 (2002–2006)
• Alfa Romeo 164 (1992–1998)
• Alfa Romeo 164 (1992–2000)
• Alfa Romeo 166 (1998–2006)
• Alfa Romeo 166 (1998–2007)
• Alfa Romeo 166 (2000–2007)
• Alfa Romeo 166 (2003–2007)
• Alfa Romeo 33 (1986–1990)
• Alfa Romeo 33 (1990–1992)
• Alfa Romeo 33 (1990–1992)
• Alfa Romeo 33 (1990–1992)
• Alfa Romeo 33 (1990–1994)
• Alfa Romeo 33 (1990–1994)
• Alfa Romeo 33 (1990–1994)
• Alfa Romeo 33 (1990–1994)
• Alfa Romeo 33 (1990–1994)
• Alfa Romeo 33 (1990–1994)
• Alfa Romeo 75 (1985–1989)
• Alfa Romeo GT (2003–2010)
• Alfa Romeo Gtv (1996–2000)
• Alfa Romeo Gtv (2000–2005)
• Alfa Romeo Gtv (2003–2005)
• Alfa Romeo Spider (1994–2005)
• Alfa Romeo Spider (1999–2003)
• Alfa Romeo Spider (2003–2005)
• Alfa Romeo Spider (2006–2011)
• Alfa Romeo Sprint (1985–1989)
• Nissan
• Nissan 180SX (1991–1999)
• Nissan 180SX (1992–1997)
• Nissan 200SX (1993–1999)
• Subaru Forester (1998–2001)
• Subaru Forester (2001–2002)
• Subaru Forester (2002–2005)

Description

Spark Plugs: Keepin' Your Performance Ride Zinging — With NGK & More!
> Spark plugs are the real MVPs of your ignition system, firing up that air-fuel mix in each cylinder. And for the high-revving, turbo-charged beasts like your Subaru WRX, Nissan 180SX Turbo, or Alfa Romeo GTA, these little beauties are under serious pressure! We're talking extreme temps and cylinder forces that can wear them down, foul 'em up, and widen those gaps, slowly but surely robbing you of that sweet, sweet power and efficiency.

Symptoms That Led You Here
• Engine misfires or rough idle, particularly noticeable in performance engines under load
• Hesitation or stumbling during acceleration—common in turbo applications where precise ignition timing is critical
• Increased fuel consumption without changes to driving habits
• Check engine light illuminated (often P0300-P0304 misfire codes)
• Hard starting in cold NZ mornings, especially in older European models like the Volvo S40/S60
• Noticeable power loss in spirited driving situations

Will it pass WOF?
Spark plugs themselves aren't a direct WOF inspection item, however the symptoms of worn plugs—excessive exhaust emissions, rough running, and illuminated warning lights—can cause WOF failure. Turbocharged vehicles like the Impreza WRX are particularly susceptible to emissions issues when spark plugs are past their service interval.

DIY or Workshop?
Difficulty: 4/10 (naturally aspirated) to 6/10 (turbocharged with intake manifold obstruction)
Estimated time: 30-90 minutes depending on engine configuration
Tools required: Spark plug socket (typically 16mm or 21mm), torque wrench, extension bar, dielectric grease, gap gauge (if not pre-gapped)

Subaru boxer engines require working from above through limited access points. Alfa Romeo V6 and transverse-mounted Volvo engines may need intake components moved. The Nissan SR20DET in the 180SX offers relatively straightforward access.

Expert Recommendation
Bob and the CARFIX team recommend replacing spark plugs at manufacturer intervals—typically 30,000-60,000km for copper/nickel plugs or 80,000-100,000km for iridium/platinum types. For the performance vehicles in this fitment range, maintaining fresh plugs is essential for preserving throttle response, fuel economy, and that characteristic engine note enthusiasts love. Bob @ CARFIX is always on hand to help you work out exactly what plug grade and heat range suits your Impreza, 180SX, or European sports sedan. Make sure you head over to Bob's Shop for a chat!

Fitment Notes
• Subaru Impreza WRX Turbo (2000-2005): Confirm correct heat range for modified engines; stock turbos typically suit standard recommendations
• Nissan 180SX Turbo (1992-1997): SR20DET engines may require colder plugs if running increased boost
• Alfa Romeo 156 GTA/166 V6: Busso V6 engines have specific plug requirements—verify thread reach
• Volvo T-5 models (C70, S60, S40): Turbocharged five-cylinders benefit from quality plugs to maintain smooth idle
• Always verify gap specification against vehicle manual; some plugs come pre-gapped, others require adjustment

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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.