Sixity Auto NGK Laser Iridium Spark Plugs for Subaru WRX 2.0L H4 (2015–2020) — 4pc, 0.024" Gap, OE Fit

High-performance NGK Laser Iridium spark plugs engineered to restore precise ignition, fuel efficiency, and reliable starts for Subaru WRX 2.0L H4 engines (2015–2020).

These four genuine NGK Laser Iridium spark plugs are specified to fit Subaru WRX models with the 2.0L H4 engine produced between 2015 and 2020. Each plug ships set to an optimal gap of 0.024" and matches original equipment manufacturer dimensions and performance characteristics. Designed by NGK, a world leader in spark plug technology, these laser-welded iridium tips and corrosion-resistant components are built to resist gap growth and maintain consistent ignitability across their service life.

Will these spark plugs fit my Subaru WRX and what are the key specs?

Yes — these plugs are compatible with Subaru WRX 2.0L H4 models from 2015 through 2020 and are supplied to OE manufacturer standards. The factory-set electrode gap is 0.024" and the set includes four plugs to replace the entire bank on the 4-cylinder engine. NGK specifies these plugs with the same fit and service interval guidance used by Subaru.

• Compatible years: 2015–2020 Subaru WRX (2.0L H4)
• Number of pieces: 4 spark plugs (complete set for the engine)
• Gap: 0.024" (factory-set)
• OE-quality component and recommended 60,000-mile service interval

How do NGK Laser Iridium plugs affect performance and reliability?

Laser-welded iridium center electrodes and robust ground electrodes create a consistent, focused spark that promotes cleaner combustion and fewer misfires. The corrosion-resistant shell and precise construction reduce electrode wear and gap growth, preserving ignition quality over time. That translates to steadier starts, reliable throttle response, and more predictable engine behavior between services.

• Sharper spark focus reduces misfires and rough idling
• Iridium tip extends service life and maintains ignition efficiency
• Corrosion-resistant materials protect threads and shell integrity
• Manufactured to NGK quality standards for consistent performance

Can these plugs help fuel economy and emissions without modifications?

Upgrading to fresh NGK Laser Iridium plugs can support more complete combustion compared with worn or fouled plugs, which often improves fuel burn efficiency and lowers misfire-related emissions. While they don’t change basic engine design, maintaining correct spark and gap helps the engine run as designed, which can contribute to slightly better economy and cleaner exhaust under normal driving.

• Improved ignitability promotes more complete fuel combustion
• Sharper sparks can reduce misfires that waste fuel
• Durable electrodes limit gap growth that harms efficiency
• Safe, OEM-style replacement—no ECU tuning required

How often should I replace these plugs and what maintenance matters?

NGK and many OEM guides recommend inspecting and replacing these plugs around every 60,000 miles under typical conditions. Check for fouling, heavy carbon build-up, or physical damage sooner if you notice misfires, rough running, or poor fuel economy. Always allow the engine to cool, use the correct socket and torque, and verify the 0.024" gap before installation if adjustments are made.

• Recommended service interval: ~60,000 miles (inspect earlier if symptoms occur)
• Inspect for carbon deposits, electrode wear, and correct gap
• Use proper torque and anti-seize practices where appropriate
• Replace full set of four plugs for consistent bank performance

Who is this for: Subaru WRX owners and DIY enthusiasts seeking a direct-fit, OE-quality spark plug upgrade that balances longevity with reliable ignition. These NGK Laser Iridium plugs are ideal for drivers who want to maintain factory performance and emissions standards, reduce misfires, and extend service intervals on 2015–2020 WRX 2.0L H4 engines without aftermarket tuning.