2309 / LFR7AIX - Iridium IX Spark Plug by NGK. 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.
* Please review the pictures listed to ensure this is the part you need *
* Any fitment data given in this listing is a guideline ONLY, please verify that this part is an exact fit for your specific vehicle and options *
Thread Size: 0.551"
Thread Reach: 26.5 mm
Ground Electrode Quantity: 1
Gap: 0.032"
Spark Plug Seat Style: Flat
Heat Range: 7
Longevity: 40-50k Miles
Shape: Taper Cut
Thread Diameter: 14 mm
Overall Height: ISO
Resistance: 5 kOhm
Insulator Height: 50.50 mm
Center Electrode Core Material: Copper Core
Ground Configuration: Standard
Ground Electrode Core Material: Nickel Core
Ground Electrode Tip Design: Taper Cut
Nominal Gap: 0.8 mm
| MPN | 2309-4K |
| OEM # | 2309-4K 2309 |
| Other # | 2309-4K 2309 |
| Details | Please review the pictures listed to ensure this is the exact part you need. |
| We recommend you check with your dealer for exact fitment for your specific vehicle. | |
| Notes |
We are committed to 100% customer satisfaction. If you are unsatisfied with your purchase please do not hesitate to contact us, we will work to resolve any problem.
Thank you for shopping with OverstockDirect!
Our return policy is fairly simple and very up front.
If you make an error and buy the wrong item or change your mind, you are responsible for paying for the return shipping costs and may be charged a restock fee that is equivalent to the original shipping cost. Please contact us prior to making a return and we can let you know what the restock fee will be and if it will be charged.
Most items can be returned within 30 days of receipt of shipment in most cases.
- We cannot accept items that have been installed, used or tried. Returned items must be re-sellable.
- Please include a copy of the invoice.
- Items must be returned in their ORIGINAL, OEM PACKAGING that they were received in.
- We do NOT charge restocking fees for items that are found to be defective.
- We do NOT charge restocking fees if we shipped you an item that doesn't match the listing
- Electrical parts are not returnable.
Your recommended responsibility on making a return:
If you are sending the item within the United States and the order is valued at $100 or more, insure the shipment for the value of the merchandise and ship your return with a signature shipping service. Items valued over $35 must be returned to the OverstockDirect with a trackable shipping service. For items below $35, we suggest USPS delivery confirmation service. If a package doesn't arrive and you don't use a trackable method to return or if you refuse the shipment as a method of return, we may not be able to cover your return.
Items typically ship the same day as ordered but always within 1 business day after the order is placed. Please note that weekends and holidays are not business days.