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    • NGK IX Iridium Spark Plug Box of 4 (TR6IX)
    • NGK IX Iridium Spark Plug Box of 4 (TR6IX)

    NGK IX Iridium Spark Plug Box of 4 (TR6IX)

    Vendor: NGK
    Part Number: 3689
    Regular Price $90.60

    In Stock

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

    • RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
    • Trivalent metal plating for superior anti-corrosion and anti-seizing properties
    • Outstanding acceleration, high fuel efficiency and durability
    • Fine iridium tip ensures durable and consistent spark

    This Part Fits:

    Year Make Model Submodel
    2000 Aston Martin DB7 Vantage
    2000 Aston Martin DB7 Vantage Volante
    2009-2015 Cadillac CTS V
    2014-2015 Chevrolet Camaro Z/28
    2012-2015 Chevrolet Camaro ZL1
    2013 Chevrolet Corvette 427
    2008 Chevrolet Corvette 427 Limited Edition Z06
    2006-2013 Chevrolet Corvette Z06
    2011 Chevrolet Corvette Z06 Carbon
    2009-2013 Chevrolet Corvette ZR1
    1996-2008,2010-2011 Ford Crown Victoria Base
    2006-2009 Ford Crown Victoria Fleet
    2002-2009 Ford Crown Victoria LWB
    1997-2011 Ford Crown Victoria LX
    2004 Ford Crown Victoria LX Sport
    1996-2005,2008-2011 Ford Crown Victoria Police Interceptor
    1996-2005 Ford Crown Victoria S
    2005 Ford Crown Victoria Special Edition
    2002-2003 Ford F-150 Harley-Davidson Edition
    1999-2003 Ford F-150 Lightning
    2004 Ford F-150 Heritage SVT Lightning
    2005-2006 Ford GT Base
    2007-2014 Ford Mustang Shelby GT500
    2008-2009 Ford Mustang Shelby GT500KR
    2001-2004 Ford Ranger Edge
    2004 Ford Ranger Tremor
    1999-2004 Ford Ranger XL
    1999-2004 Ford Ranger XLT
    1999-2004 Ford Taurus LX
    1999-2006 Ford Taurus SE
    2000,2003 Ford Taurus SE Comfort
    2004-2006 Ford Taurus SEL
    2000-2004 Ford Taurus SES
    2000 Ford Taurus SVG
    2006-2007 Lincoln Town Car Designer Series
    2006-2010 Lincoln Town Car Executive
    2006-2011 Lincoln Town Car Executive L
    2006 Lincoln Town Car Protection Series
    2006-2007 Lincoln Town Car Signature
    2006-2011 Lincoln Town Car Signature L
    2006-2011 Lincoln Town Car Signature Limited
    2001 Mazda B3000 DS
    1999-2001 Mazda B3000 SE
    2000 Mazda B3000 SX
    1999-2000 Mazda B3000 Troy Lee
    2006-2008 Mercury Grand Marquis GS
    2006-2011 Mercury Grand Marquis LS
    2003-2005 Mercury Sable GS
    2001 Mercury Sable LS
    1989 Pontiac Firebird Trans Am
    1989 Pontiac Firebird Trans Am GTA SE
    1990 Pontiac Grand Prix Mclaren
    1989 Pontiac Grand Prix SE
    1990 Pontiac Grand Prix STE
    1968-1971 Rover 2000 Base
    1968-1971 Rover 2000 TC
    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy

    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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