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    • NGK Iridium Spark Plug Box of 4 (BKR6EIX)
    • NGK Iridium Spark Plug Box of 4 (BKR6EIX)

    NGK Iridium Spark Plug Box of 4 (BKR6EIX)

    Vendor: NGK
    SKU: NGK6418
    Regular Price $37.60
    Fast Fulfillment: In-stock parts typically ship same day or next business day.
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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
    1994-1995 Alfa Romeo 164 LS
    1994-1995 Alfa Romeo 164 Quadrifoglio
    1991-1993 Alfa Romeo 164 Sport
    1987 Audi 5000 CS
    1986-1988 Audi 5000 Quattro CS
    1990-1991 Audi 90 Quattro 20v
    1996-2005 Audi A4 Base
    2003-2006 Audi A4 Cabriolet
    1998-2005 Audi A4 Quattro Avant
    1996-2005 Audi A4 Quattro Base
    1995-1997 Audi A6 Avant
    1995-2001 Audi A6 Base
    1995-1996,1998-2001 Audi A6 Quattro Avant
    1995-1996,1998-2004 Audi A6 Quattro Base
    1997-2003,2005-2006 Audi A8 Quattro Base
    2000-2006 Audi A8 Quattro L
    2001-2005 Audi Allroad Quattro Base
    1995-1996 Audi Cabriolet Base
    1990-1991 Audi Coupe Quattro 20v
    2001-2002,2004-2008 Audi S4 Avant
    2000-2002,2004-2008 Audi S4 Base
    2004-2009 Audi S4 Cabriolet
    2002-2003 Audi S6 Avant
    2001-2003 Audi S8 Base
    2000-2006 Audi TT Base
    2002 Audi TT Quattro ALMS Edition
    2000-2006 Audi TT Quattro Base
    1999 Bentley Arnage Base
    1991-1998 BMW 318i Base
    1991-1997 BMW 318is Base
    1995-1999 BMW 318ti Base
    2000 BMW 323Ci Base
    1998-2000 BMW 323i Base
    1998-1999 BMW 323is Base
    2001-2006 BMW 325Ci Base
    1992-1995,2001-2005 BMW 325i Base
    1992-1995 BMW 325is Base
    2001-2005 BMW 325xi Base
    2000 BMW 328Ci Base
    1996-2000 BMW 328i Base
    1996-1999 BMW 328is Base
    2001-2006 BMW 330Ci Base
    2001-2005 BMW 330i Base
    2001-2005 BMW 330xi Base
    1991-1995,2001-2005 BMW 525i Base
    1993 BMW 525iT Base
    1997-2000 BMW 528i Base
    1994-1995,2001-2005 BMW 530i Base
    1994-1995,1997-2003 BMW 540i Base
    2004-2005 BMW 545i Base
    2004-2005 BMW 645Ci Base
    1993-1995,1997-2001 BMW 740i Base
    1993-2001 BMW 740iL Base
    2002-2005 BMW 745i Base
    2002-2005 BMW 745Li Base
    1998-2001 BMW 750iL Base
    2004-2006 BMW 760i Base
    2003-2008 BMW 760Li Base
    1994-1997 BMW 840Ci Base
    1995-1999 BMW M3 Base
    1995 BMW M3 Lightweight
    2000-2003 BMW M5 Base
    2004-2005 BMW X3 2.5i
    2004-2006 BMW X3 3.0i
    2001-2006 BMW X5 3.0i
    2000-2006 BMW X5 4.4i
    2002-2003 BMW X5 4.6is
    1999-2002 BMW Z3 Coupe
    1999-2000 BMW Z3 M Coupe
    1998-2000 BMW Z3 M Roadster
    1996-2002 BMW Z3 Roadster
    2003-2005 BMW Z4 2.5i
    2003-2005 BMW Z4 3.0i
    2003 BMW Z8 Alpina
    2000-2003 BMW Z8 Base
    2003-2004 Cadillac CTS Base
    2003 Cadillac CTS Luxury
    2003 Cadillac CTS Luxury Sport
    2014-2016 Cadillac ELR Base
    2005-2007 Chevrolet Cobalt SS
    2015 Chevrolet Cruze L
    2011-2015 Chevrolet Cruze LS
    2016 Chevrolet Cruze Limited L
    2016 Chevrolet Cruze Limited LS
    2016 Chevrolet Cruze Limited LT
    2012-2017 Chevrolet Sonic LS
    2012-2017 Chevrolet Sonic LT
    2012-2014 Chevrolet Sonic LTZ
    1998 Chevrolet Tracker Base
    1998 Chevrolet Tracker LSi
    2011-2015 Chevrolet Volt Base
    2000 Chrysler Cirrus LX
    1999-2002 Daewoo Leganza CDX
    1999-2002 Daewoo Leganza SE
    1999-2001 Daewoo Leganza SX
    1998-1999,2001-2002 Dodge Neon ACR
    1995-1997,2001-2002 Dodge Neon Base
    2000-2002 Dodge Neon ES
    1995-2000 Dodge Neon High Line
    1998-1999,2001-2004 Dodge Neon R/T
    2001-2005 Dodge Neon SE
    1995-1999 Dodge Neon Sport
    2003-2005 Dodge Neon SXT
    1995-1999 Dodge Stratus Base
    1995-1997 Dodge Stratus ES
    2000 Dodge Stratus SE
    1990-1992 Geo Prizm GSi
    1994-1997 Geo Tracker Base
    1994-1997 Geo Tracker LSi
    1993-1995 Hyundai Scoupe Turbo
    2012-2013 Indian Chief Classic Base
    2013 Indian Chief Dark Horse Base
    2012-2013 Indian Chief Vintage Base
    1991-1992 Isuzu Impulse RS
    1988-1992 Jaguar Vanden Plas Base
    1989-1990,1992 Jaguar Vanden Plas Majestic
    1988-1997 Jaguar XJ6 Base
    1997 Jaguar XJ6 L
    1990-1993 Jaguar XJ6 Sovereign
    1995-1996 Jaguar XJR Base
    1994-1996 Jaguar XJS 2+2
    1993-1995 Jaguar XJS Base
    2013 John Deere Gator XUV 825i 4x4 Base
    2013 John Deere Gator XUV 825i 4x4 Power Steering Base
    2013 John Deere Gator XUV 825i 4x4 S4 Base
    2001-2002 Kia Rio Base
    2002 Kia Rio Cinco
    1998-2001 Kia Sephia Base
    1998-2001 Kia Sephia LS
    2002-2004 Kia Spectra Base
    2000-2004 Kia Spectra GS
    2000-2004 Kia Spectra GSX
    2002-2004 Kia Spectra LS
    2003-2005 Land Rover Range Rover HSE
    1990,1992 Lotus Elan Base
    1997-2003 Lotus Esprit V8
    2003-2012 Maybach 57 Base
    2006-2012 Maybach 57 S
    2010 Maybach 57 S Zeppelin
    2003-2012 Maybach 62 Base
    2007-2012 Maybach 62 S
    2010-2012 Maybach 62 S Landaulet
    2010 Maybach 62 S Zeppelin
    2002 Mercedes-Benz C230 Kompressor
    2002 Mercedes-Benz C32 AMG Base
    2003-2014 Mercedes-Benz CL600 Base
    2005-2006,2008-2014 Mercedes-Benz CL65 AMG Base
    2016-2018 Mercedes-Benz G65 AMG Base
    2016-2017 Mercedes-Benz Maybach S600 Base
    2018-2020 Mercedes-Benz Maybach S650 Base
    2003-2013,2015-2017 Mercedes-Benz S600 Base
    2006-2013,2015-2020 Mercedes-Benz S65 AMG Base
    2004-2009 Mercedes-Benz SL600 Base
    2005-2009,2011,2013-2018 Mercedes-Benz SL65 AMG Base
    2009 Mercedes-Benz SL65 AMG Black Series
    2002 Mercedes-Benz SLK32 AMG Base
    2002-2006 Mini Cooper Base
    2002-2006 Mini Cooper S
    1996-1997 Mitsubishi Eclipse Base
    1995-1998 Mitsubishi Eclipse GS
    2006-2012 Mitsubishi Eclipse GT
    2003-2005 Mitsubishi Eclipse GTS
    1995-1998 Mitsubishi Eclipse RS
    2008 Mitsubishi Eclipse SE
    2007-2012 Mitsubishi Eclipse Spyder GT
    2003-2005 Mitsubishi Eclipse Spyder GTS
    2004-2006 Mitsubishi Endeavor Limited
    2004-2008,2010-2011 Mitsubishi Endeavor LS
    2007-2008,2010-2011 Mitsubishi Endeavor SE
    2004-2005 Mitsubishi Endeavor XLS
    2004-2007 Mitsubishi Galant GTS
    2004-2006 Mitsubishi Galant LS
    2007-2009 Mitsubishi Galant Ralliart
    2009 Mitsubishi Galant Sport V6
    2008-2010 Mitsubishi Lancer DE
    2008-2010 Mitsubishi Lancer ES
    2008 Mitsubishi Lancer GTS
    2003-2006 Mitsubishi Montero Limited
    2003-2004 Mitsubishi Montero XLS
    2004-2005 Morgan Aero 8 Base
    1990-1994 Nissan D21 Base
    1990-1994 Nissan D21 SE
    1994 Nissan D21 XE
    1994-1995 Nissan Pathfinder LE
    1990-1995 Nissan Pathfinder SE
    1990-1995 Nissan Pathfinder XE
    1995 Nissan Pickup SE
    1995 Nissan Pickup XE
    1996-2000 Plymouth Breeze Base
    1998-1999 Plymouth Breeze Expresso
    1998-1999 Plymouth Neon ACR
    1995-1997 Plymouth Neon Base
    1998-1999 Plymouth Neon Expresso
    1995-2001 Plymouth Neon High Line
    2000-2001 Plymouth Neon LX
    1995-1996 Plymouth Neon Sport
    1998-1999 Plymouth Neon Style
    2004-2005 Polaris ATP 330 Base
    2004-2005 Polaris ATP 500 Base
    2006 Polaris FST Classic Base
    Shipping Policy

    Shipping Policy Last Updated: April 2026

    We're committed to getting your order to you as quickly and transparently as possible. Here's everything you need to know about how we ship.

    Order Cancellations

    Once an order is placed, cancellations are not guaranteed as orders are sent to fulfillment quickly. If you need to cancel, contact us immediately at sales@berryperformancesales.com. If a cancellation is possible, the buyer is responsible for any transaction fees incurred. If the order has already shipped, it cannot be cancelled and must go through our standard return process.

    Processing Time

    In-stock orders are typically processed and shipped within 1–2 business days of receiving payment, unless otherwise noted on the product page. Orders placed on weekends or holidays will be processed on the next business day.

    Shipping Costs

    Shipping costs are calculated at checkout based on the shipping method selected, package weight and dimensions, and destination address. You can review all shipping costs before finalizing your purchase.

    Estimated Delivery Times

    Domestic orders typically arrive within 1–7 business days after shipment, depending on your location and the carrier. Please note that delivery times are estimates and are not guaranteed. Delays due to weather, carrier volume, or other circumstances beyond our control may occur.

    Tracking Information

    Once your order ships, you will receive a confirmation email with tracking information. Use this to monitor your package's progress. If your tracking has not updated within 48 hours of receiving your confirmation email, please contact us and we'll look into it.

    Shipping Address

    Please ensure your shipping address is accurate and complete before placing your order. If you realize an error after ordering, contact us immediately at sales@berryperformancesales.com — we will do our best to make the correction, but changes cannot be guaranteed once an order is in fulfillment. We are not responsible for orders shipped to incorrect or undeliverable addresses due to customer error.

    Please note: We are unable to ship to P.O. Boxes. Please provide a physical delivery address at checkout.

    Lost or Stolen Packages

    If your tracking shows your order as delivered but you have not received it, please take the following steps:

    • Check around your property and with neighbors
    • Confirm the shipping address on your order was correct
    • Contact the carrier directly with your tracking number

    If the issue remains unresolved, contact us at sales@berryperformancesales.com within 5 business days of the marked delivery date. We will work with you and the carrier to investigate. Berry Performance Sales is not responsible for packages confirmed as delivered by the carrier or for packages stolen after delivery.

    Damaged in Transit

    If your order arrives visibly damaged, please refer to our Returns & Refunds policy for instructions on how to report the issue. Carrier damage claims must be reported within 48 hours of delivery.

    International Shipping

    We do ship internationally! Because shipping costs, carrier options, and transit times vary significantly by destination, international orders require a custom quote prior to purchase. To request a shipping quote, contact us at sales@berryperformancesales.com with the following:

    • Your country and full delivery address
    • The item(s) you are interested in ordering

    We will respond with a shipping quote as quickly as possible. Please note that customs duties, import taxes, and any other fees charged upon delivery are the sole responsibility of the recipient and are not included in your shipping quote. We recommend checking with your local customs office before placing your order.

    Off-Road Use Disclaimer

    All products are sold for off-road use only unless otherwise specified. The buyer assumes full responsibility for installation and operation. Berry Performance Sales is not liable for any incidental, indirect, or consequential damages including engine failure, labor charges, or vehicle downtime resulting from the use of any product sold. By placing an order, you acknowledge and accept these terms.

    Questions?

    We're happy to help before, during, or after your purchase. Email: sales@berryperformancesales.com

    Berry Performance Sales reserves the right to update this policy at any time. Changes take effect immediately upon posting. It is the customer's responsibility to review the current policy at the time of purchase.

    Return Policy

    Returns & Refunds Last Updated: April 2026

    We want you to love what you ordered. If something isn't right, here's everything you need to know.

    30-Day Return Window

    You have 30 days from the date of purchase to initiate a return. After this window, we are unable to accept returns. We do not offer exchanges — all approved returns are refunded per the terms below.

    How to Initiate a Return

    To request a return, contact us at sales@berryperformancesales.com with your order number and reason for return. All returns must be approved by our team before any item is shipped back to us. Once your return has been approved, your item must be shipped within 10 days of approval. Items shipped without prior approval or outside this window will be refused and returned to sender.

    Return Conditions

    To be eligible for a return, items must be:

    • Unused and in original condition
    • In original packaging
    • Inclusive of all parts and accessories

    Custom ordered products are non-returnable. If you're unsure whether your item qualifies, contact us before purchasing.

    Once we receive your return, we will inspect the item before processing any refund. We reserve the right to deny or adjust your refund if the item is received in a condition that differs from what was originally shipped — including signs of use, missing parts, or damage that occurred after delivery.

    Fees to Know Upfront

    We believe in being transparent about costs:

    • Restocking Fee: 20% — deducted from all return refunds
    • Return Shipping: Buyer's responsibility on all standard returns
    • Cancellation (Installment/Payment Plan): 7% fee to cover transaction costs
    • Cancellation (Credit Card/PayPal): 3.5% processing fee

    Damaged or Defective Items

    If your order arrives damaged or defective, you must contact us within 48 hours of delivery at sales@berryperformancesales.com. Claims reported outside this window may not be eligible for resolution.

    When contacting us, please include:

    • Your order number
    • A description of the issue
    • Clear photos or video of the damage or defect

    If your item was damaged during shipping, this is handled as a carrier claim separate from our standard return process — we will assist you in filing that claim. Items confirmed to be defective due to a manufacturing or fulfillment error will have return shipping costs covered by Berry Performance Sales.

    Refunds

    Once we receive and inspect your return, refunds are processed within 3–5 business days back to your original payment method. You'll receive a confirmation once it's been issued.

    Questions?

    We're happy to help before, during, or after your purchase. Email: sales@berryperformancesales.com

    Berry Performance Sales reserves the right to update this policy at any time. Changes take effect immediately upon posting. It is the customer's responsibility to review the current policy at the time of purchase.

    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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