Ngk Spark Plug CR9EIX 3521 NG3521

Description

NGK Iridium IX Spark Plug - CR9EIX (3521)

Key Features:

  • Iridium Alloy Electrode: The highly advanced iridium electrode is 25% smaller than platinum and 1/4 the size of a conventional nickel electrode. This enables superior ignition performance and efficiency.
  • Fine Wire Center Electrode: Reduces voltage requirements for ignition, extending the lifespan of your ignition system while providing a more reliable spark.
  • High Melting Point: Iridium has a very high melting point, ideal for today's high-tech, high-performance engines, ensuring durability under extreme conditions.
  • Corrosion-Resistant Plating: The new metal shell plating has enhanced anti-corrosion properties, ensuring the spark plug lasts longer and remains reliable.
  • Corrugated Ribs: Prevents flashover and improves the stability of the spark.
  • Superior Ceramic Insulator: Made from pure alumina silicate, ensuring high strength and better heat transfer for long-lasting performance.

Specifications:

  • Heat Range: 9
  • Thread Size: 10 mm
  • Type: Resistor
  • Units: Sold individually
  • Weight: 0.12 lbs
  • Alternate/OEM Part Numbers: 3521, CR9EIX
  • Electrode Material: Iridium (fine wire center electrode)
  • Hex Size: 5/8" (16mm)
  • Reach: 19mm (3/4")
  • Seat Type: Gasket Seat
  • Gap: 0.031" (0.8mm)
  • Terminal Type: Stud Terminal Threads
  • Plating: Trivalent metal plating for corrosion resistance
  • Seal Type: Triple Seals

Applications:

The NGK Iridium IX Spark Plug - CR9EIX is ideal for high-performance motorcycles, ATVs, and other vehicles that require superior ignition performance. Some of the compatible models include:

Ducati:

  • ST3 (2004-2005)

Kawasaki:

  • ZX600E Ninja ZX-6 (1993-2008)
  • ZX600F Ninja ZX-6R (1995-2007)
  • ZX600G Ninja ZX-6R (1998-1999)
  • ZX1000 Ninja ZX-10R (2004-2007)

Piaggio:

  • MP3 250 (2007-2010)

Polaris:

  • Ranger 570 RZR (2012-2014)
  • Ranger 900 XP (2014-2016)
  • Ranger 900 Crew (2014-2015)

Suzuki:

  • GSX1300R Hayabusa (1999-2018)
  • GSX-R1000 (2001-2018)
  • GSX-R600 (2001-2008)
  • GSX-R750 (2001-2018)

Yamaha:

  • YZF600R (1994-2007)
  • YZF750R (1998)

Benefits:

  • Improved Engine Performance: The fine wire center electrode and iridium material ensure a more efficient spark, leading to better acceleration, throttle response, and overall performance.
  • Enhanced Durability: The high-quality iridium electrode and anti-corrosion features ensure a longer lifespan, reducing the frequency of spark plug replacements.
  • Better Fuel Efficiency: The improved ignition system reduces misfires and optimizes combustion, improving fuel efficiency and reducing emissions.
  • Heat Management: The superior heat transfer properties of the ceramic insulator and copper core ensure that the spark plug performs well under high-temperature conditions, preventing overheating and ensuring consistent performance.

Overview:

The NGK Iridium IX Spark Plug - CR9EIX is designed for performance enthusiasts who demand the best from their engine's ignition system. Whether you're riding a high-performance motorcycle like the Kawasaki Ninja ZX-6 or Suzuki GSX1300R Hayabusa, this spark plug will provide the reliability, durability, and performance needed for top-level engine efficiency. The iridium center electrode, combined with advanced materials and design, makes it a top choice for anyone seeking enhanced engine performance and fuel efficiency.

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer Model Years
HUSQVARNA TE 250 2010-2012
YAMAHA WR F 250 2007-2013
KTM SX F 250 2006-2012
HUSABERG FE 250 2013
KTM XC F 505 2009
KTM SX F 450 2007-2012
YAMAHA WR X 250 2008-2011
YAMAHA WR R 250 2008-2020
KTM XC F 250 2011
KTM SX F 505 2007-2008
SUZUKI DR SE 350 1994-1999
KTM XCF W 250 2013
YAMAHA TT R 250 2003-2005
GAS-GAS EC F 300 2013-2021
HUSQVARNA TXC 250 2010-2021
KTM RALLY FACTORY REPLICA 450 2014
HUSQVARNA TE 449 2011-2012
HUSQVARNA TE 511 2011-2021
HUSQVARNA TC 449 2011-2012
HUSQVARNA SM RR 450 2008-2021
BMW G X 450 2008-2021

Ngk Spark Plug CR9EIX 3521 NG3521

Product form

NGK Iridium IX Spark Plug - CR9EIX (3521) Key Features: Iridium Alloy Electrode: The highly advanced iridium electrode is 25%... Read more

165 in stock 1-2 business days

£23.49 Incl. VAT

    • Guaranteed secure & safe checkout.

      shop pay

    SKU: 37-CR9EIX
    Barcode: 087295035214

    • Free shipping on all orders above £75
    • No hassle returns within 30 days

    Description

    NGK Iridium IX Spark Plug - CR9EIX (3521)

    Key Features:

    • Iridium Alloy Electrode: The highly advanced iridium electrode is 25% smaller than platinum and 1/4 the size of a conventional nickel electrode. This enables superior ignition performance and efficiency.
    • Fine Wire Center Electrode: Reduces voltage requirements for ignition, extending the lifespan of your ignition system while providing a more reliable spark.
    • High Melting Point: Iridium has a very high melting point, ideal for today's high-tech, high-performance engines, ensuring durability under extreme conditions.
    • Corrosion-Resistant Plating: The new metal shell plating has enhanced anti-corrosion properties, ensuring the spark plug lasts longer and remains reliable.
    • Corrugated Ribs: Prevents flashover and improves the stability of the spark.
    • Superior Ceramic Insulator: Made from pure alumina silicate, ensuring high strength and better heat transfer for long-lasting performance.

    Specifications:

    • Heat Range: 9
    • Thread Size: 10 mm
    • Type: Resistor
    • Units: Sold individually
    • Weight: 0.12 lbs
    • Alternate/OEM Part Numbers: 3521, CR9EIX
    • Electrode Material: Iridium (fine wire center electrode)
    • Hex Size: 5/8" (16mm)
    • Reach: 19mm (3/4")
    • Seat Type: Gasket Seat
    • Gap: 0.031" (0.8mm)
    • Terminal Type: Stud Terminal Threads
    • Plating: Trivalent metal plating for corrosion resistance
    • Seal Type: Triple Seals

    Applications:

    The NGK Iridium IX Spark Plug - CR9EIX is ideal for high-performance motorcycles, ATVs, and other vehicles that require superior ignition performance. Some of the compatible models include:

    Ducati:

    • ST3 (2004-2005)

    Kawasaki:

    • ZX600E Ninja ZX-6 (1993-2008)
    • ZX600F Ninja ZX-6R (1995-2007)
    • ZX600G Ninja ZX-6R (1998-1999)
    • ZX1000 Ninja ZX-10R (2004-2007)

    Piaggio:

    • MP3 250 (2007-2010)

    Polaris:

    • Ranger 570 RZR (2012-2014)
    • Ranger 900 XP (2014-2016)
    • Ranger 900 Crew (2014-2015)

    Suzuki:

    • GSX1300R Hayabusa (1999-2018)
    • GSX-R1000 (2001-2018)
    • GSX-R600 (2001-2008)
    • GSX-R750 (2001-2018)

    Yamaha:

    • YZF600R (1994-2007)
    • YZF750R (1998)

    Benefits:

    • Improved Engine Performance: The fine wire center electrode and iridium material ensure a more efficient spark, leading to better acceleration, throttle response, and overall performance.
    • Enhanced Durability: The high-quality iridium electrode and anti-corrosion features ensure a longer lifespan, reducing the frequency of spark plug replacements.
    • Better Fuel Efficiency: The improved ignition system reduces misfires and optimizes combustion, improving fuel efficiency and reducing emissions.
    • Heat Management: The superior heat transfer properties of the ceramic insulator and copper core ensure that the spark plug performs well under high-temperature conditions, preventing overheating and ensuring consistent performance.

    Overview:

    The NGK Iridium IX Spark Plug - CR9EIX is designed for performance enthusiasts who demand the best from their engine's ignition system. Whether you're riding a high-performance motorcycle like the Kawasaki Ninja ZX-6 or Suzuki GSX1300R Hayabusa, this spark plug will provide the reliability, durability, and performance needed for top-level engine efficiency. The iridium center electrode, combined with advanced materials and design, makes it a top choice for anyone seeking enhanced engine performance and fuel efficiency.

    Vehicle Compatibility

    Please check the exact model and year before ordering.

    Manufacturer Model Years
    HUSQVARNA TE 250 2010-2012
    YAMAHA WR F 250 2007-2013
    KTM SX F 250 2006-2012
    HUSABERG FE 250 2013
    KTM XC F 505 2009
    KTM SX F 450 2007-2012
    YAMAHA WR X 250 2008-2011
    YAMAHA WR R 250 2008-2020
    KTM XC F 250 2011
    KTM SX F 505 2007-2008
    SUZUKI DR SE 350 1994-1999
    KTM XCF W 250 2013
    YAMAHA TT R 250 2003-2005
    GAS-GAS EC F 300 2013-2021
    HUSQVARNA TXC 250 2010-2021
    KTM RALLY FACTORY REPLICA 450 2014
    HUSQVARNA TE 449 2011-2012
    HUSQVARNA TE 511 2011-2021
    HUSQVARNA TC 449 2011-2012
    HUSQVARNA SM RR 450 2008-2021
    BMW G X 450 2008-2021

    Shipping & Delivery

    How long will my item take to arrive?

    Orders are typically dispatched within 1 working day and are shipped on a 24hour (non-guaranteed) service.

    Where do you ship to?

    We currently only ship orders within the UK.

    How can I track my order?

    Once your order has been dispatched, you will receive a tracking code. Tracking information is emailed to the email address that was provided when placing the order.

    Can I collect my order?

    Unfortunately we do not offer order collections from our fulfilment centre.

    WHY NOT CHECK OUT

    Recently viewed products

      © 2026 Radhouse, Powered by Shopify

        • American Express
        • Apple Pay
        • Diners Club
        • Discover
        • Google Pay
        • Maestro
        • Mastercard
        • PayPal
        • Shop Pay
        • Union Pay
        • Visa