NGK (LFR7AIX) Iridium IX 1 Step Colder Spark Plugs Subaru WRX 2006-2014 / STI 2004-2021 | 2309

Rated 5.0 out of 5
Based on 50 reviews
SKU: ngk2309
Availability: 556 In Stock Learn more
Type: Engine Spark Plugs
Regular price
$29.87
Regular price
$33.80
Sale price
$29.87
Instant Discount

Regular Price: $33.80 - Instant discount: $3.93 = $29.87


Subtotal: $29.87

Delivery Options:

  • Economy $11.95
  • 2 Business Day
  • Next Business Day
  • Slow $3.95
Fastrak Delivery: , Order within hours minutes
Next Day Delivery Eligibility
  • Order in-stock items before 3:30 PM EST with 'Fastest' delivery for next-day arrival.
  • Orders from Friday to Sunday arrive by the following Tuesday.

Delays can happen. Contact us if your order doesn't arrive on time for a $20 credit on your next purchase. Minimum order must be $99

Fitment Information:

2006-2014 Subaru WRX

2004-2021 Subaru STi

2005-2009 Subaru Legacy GT

2005-2009 Subaru Outback XT

2004-2008 Subaru Forester XT

Features:

  • Sold as a set of 4 spark plugs
  • Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
  • Corrugated ribs prevent flashover
  • Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer
  • Copper core aids in heat removal
  • Triple seals prevent leakage
  • Longevity: 50k Miles
  • 60 Days manufacturer Warranty

Shell
Spark Plug Thread Diameter: 14mm
Thread Pitch: 1.25mm
Seat Type: Flat
Reach: 26.5mm (1.04")
Wrench Diameter: 5/8" (16mm)
Terminal Type: Solid
Gap: .031" (0.8mm)

Center Electrode
Electrode Tip Material: Iridium
Electrode Core Material: Copper

Ground Electrode
Material: Nickel
Type: Standard
Shape: Taper Cut

Specifications
Resistor: Yes
Resistor Value: 5k Ohm
Manufacturer Heat Range: 7
Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.

Why NGK Iridium? More Durability and a Higher Melting Point compared to Platinum, better center electrode anti-oxidation and anti-erosion, improved ignition, superior anti-fouling, lower required voltage, new metal shell plating process for better anti-corrosion. One Step Colder plugs are recommended for cars with heavy modifications. These NGK plugs will get your Turbo Subaru running smoother and free up some power through increased efficiency and increased heat resistance. These are available in stock heat or one step colder for cars running approximately 100 horsepower more than stock.

Please Note:

Iridium plugs are able to use larger gap setting with less voltage. Some customers choose to regap these plugs to correct misfiring or tune for optimal spark -- do so at your own risk -- slide-type plug gapper will damage the fragile iridium tip.

Import Image Racing is an authorized dealer for NGK Spark Plugs. Purchasing from us guarantee's that your NGK products are always authentic and covered by manufacturer warranty.



average rating 5.0 out of 5
Based on 50 reviews
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Review posted
Reviewed by Robert P.
Verified Buyer
Rated 5 out of 5

NGK Spark Plugs

Car runs great with new spark plugs.

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Review posted
Reviewed by Lucky T.
Verified Buyer
Rated 5 out of 5

Great, simple upgrade before tuning

Installation was an absolute pain but I'm sure other people will do just fine. Smooth as butter.

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Review posted
Reviewed by Armando V.
Verified Buyer
Rated 5 out of 5

One Step Colder NGK Iridium Plugs

A must before any protune. No gapping is necessary. Doubled checked just in case. Installed 2018 Subaru STI.

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Reviewed by Abdiel R.
Verified Buyer
Rated 5 out of 5

100% recommended

You can feel the difference

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Review posted
Reviewed by Josh R.
Verified Buyer
Rated 5 out of 5

One step colder

A must buy , if you are going to run more then stock whp.

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Reviewed by Daniel S.
Verified Buyer
Rated 5 out of 5

The go to

Ngk 2309s have been the go to when adding power and needing a 1 step colder plug

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Reviewed by DOMINIC T.
Verified Buyer
Rated 5 out of 5

QUALITY PARTS UNBEATABLE PRICE!

SHOWED UP QUICKLY, PACKAGING WAS GREAT! EXACTLY WHAT MY CAR NEEDED

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Review posted
Reviewed by Galen
Rated 5 out of 5

5 Stars

Good spark plug

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Review posted
Reviewed by Karlynton R.
Verified Buyer
Rated 5 out of 5

Definitely recommend these plugs

The car seems to like these plugs since I’ve been running them so no complaints here

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Review posted
Reviewed by Abel
Rated 5 out of 5

5 Stars

17’ STI pro-tuned w/ upgraded fuel system. Seems to react well with colder gap. Improved mileage 2-3 miles also. Would recommend for sure

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