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NGK Iridium Spark Plugs One Step Colder 2309 (Part Number: )
NGK Iridium Spark Plugs One Step Colder 2309 (Part Number: )
NGK Iridium Spark Plugs One Step Colder 2309 (Part Number: )
NGK Iridium Spark Plugs One Step Colder 2309 (Part Number: )
NGK Iridium Spark Plugs One Step Colder 2309 (Part Number: )
NGK Iridium Spark Plugs One Step Colder 2309 (Part Number: )
NGK Iridium Spark Plugs One Step Colder 2309 (Part Number: )
Community Media
NGK Iridium Spark Plugs One Step Colder 2309 (Part Number: )
NGK Iridium Spark Plugs One Step Colder 2309
Subaru EJ25 Turbo Models (inc. 2004+ STI / 2006-2014 WRX)
Read 19 Reviews | 70 Q&As
Part # LFR7AIX-GRP
$44.80
msrp: $73.24

In stock! Ships same day

INCLUDES:

Features & Product Details

NGK Iridium IX Spark Plugs are designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling.

The fine Iridium tip ensures high durability and a consistently stable spark. Iridium alloy has extremely high melting point, perfect for today's high-tech, high-performance engines. Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties. Outstanding acceleration, high fuel efficiency and durability. Ultimate design, technology and performance.

These are one step colder plugs and are recommended for higher horsepower applications. A higher heat range number does not improve engine performance, it increases the plugs ability to dissipate heat.

Stock Number 2309
Heat Range: 7
Plug Gap: .031

Specifications

Brand: NGK
Heat Range: 7
Plug Gap: .031
QTY: 4
Stock Number: 2309
Mfgr. Warranty: 60 Days
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days


Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
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REVIEWS & CUSTOMER MEDIA

19 Reviews
4.7 out of 5 Stars
5 Stars
(15)
4 Stars
(3)
3 Stars
(1)
2 Stars
(0)
1 Stars
(0)
Customer Photos and Videos
NGK Iridium Spark Plugs One Step Colder 2309 ( Part Number: LFR7AIX-GRP)
1 of 1 people found the following review helpful
Surprised at the different. Stage 2+ 13' WRX 6 months ago
5out of 5stars

I'm running an e-tune from torqued performance for stage 2 and I was regularly getting feedback knock (accessport), small numbers that tuner said weren't dangerous but it still bothered me. Tuner recommended the added protection of these and after install I'm getting zero feedback knock. Weird note: My exhaust note changed slightly with these.
  
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Worked as intended  6 months ago
4out of 5stars

Pre gapped plugs. Worked as advertised.
  
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Good plugs 9 months ago
4out of 5stars

Used on a protuned 06 legacy gt. Helped keep egt in check and fit perfect!
  
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Fast shipping  10 months ago
5out of 5stars

Ngk plugs are top of the line, one step colder works great with 400whp on my Sti.
  
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 10 months ago
5out of 5stars

  
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QUESTIONS & ANSWERS

  • Q: Spark Plugs  Subielover19996 days ago

    I see these spark plugs already come pre gapped to .31. Would i be able to lower the gap to .26-.29 ?
  • Q: NGK Spark plugs one step colder.  NGK spark plugs17 days ago

    So i have a 2006 sti basically full bolt on and built long block and i make 300whp and 345tq on mustage dyno and would u recommend these plugs and would i have to gap them?
    • 0 of 0 people found the following answer helpful

      A:  These plugs are a great option for you. Due to the plugs being iridium they come pre gapped.

      Jared A. @ RallySport Direct 14 days ago  
        
      Was this answer helpful?
  • Q: 2007 Subaru sti Cobb Stage 2  MarioHdz262628 days ago

    Would this work with the Cobb stage 2?
  • Q: Spark plugs   Daniel11 month ago

    Car was tuned on e85 with these plugs in, I decided to tune it back to 91 with those plugs in. I’m changing my plugs and was wondering if I should stick to these or change?
    • 0 of 0 people found the following answer helpful

      A:  It would depend on the power difference with that setup, always consult your turner before making any changes

      Devan M. @ RallySport Direct 1 month ago  
        
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  • Q: 2007 subaru wrx sti turbo  Jake2 months ago

    I have a 2007 subaru wrx sti that is rt tuned pushing 316 hp 362 torque it is currently running on 93 octane im just wondering if these plugs would be good
    • 0 of 0 people found the following answer helpful

      A:  Yes, with the power you are making you would benefit from a one step colder spark plug.

      Brady R @ RallySport Direct 1 month ago  
        
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This Part Fits

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2009 Subaru Impreza 2.5 GT Hatchback
2010 Subaru Impreza 2.5 GT Hatchback
2.5 GT Sedan
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WRX
2006 Subaru Impreza WRX
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WRX Limited
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2007 Subaru Impreza WRX Limited
WRX Limited Hatchback
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WRX Limited Sedan
2010 Subaru Impreza WRX Limited Sedan
2011 Subaru Impreza WRX Limited Sedan
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2013 Subaru Impreza WRX Limited Sedan
2014 Subaru Impreza WRX Limited Sedan
WRX Premium Hatchback
2010 Subaru Impreza WRX Premium Hatchback
2011 Subaru Impreza WRX Premium Hatchback
2012 Subaru Impreza WRX Premium Hatchback
2013 Subaru Impreza WRX Premium Hatchback
2014 Subaru Impreza WRX Premium Hatchback
WRX Premium Sedan
2010 Subaru Impreza WRX Premium Sedan
2011 Subaru Impreza WRX Premium Sedan
2012 Subaru Impreza WRX Premium Sedan
2013 Subaru Impreza WRX Premium Sedan
2014 Subaru Impreza WRX Premium Sedan
WRX STI
2004 Subaru Impreza WRX STI
2005 Subaru Impreza WRX STI
2006 Subaru Impreza WRX STI
2007 Subaru Impreza WRX STI
WRX STI Hatchback
2008 Subaru Impreza WRX STI Hatchback
2009 Subaru Impreza WRX STI Hatchback
2010 Subaru Impreza WRX STI Hatchback
2011 Subaru Impreza WRX STI Hatchback
2012 Subaru Impreza WRX STI Hatchback
2013 Subaru Impreza WRX STI Hatchback
2014 Subaru Impreza WRX STI Hatchback
WRX STI Limited
2007 Subaru Impreza WRX STI Limited
WRX STI Limited Hatchback
2011 Subaru Impreza WRX STI Limited Hatchback
2012 Subaru Impreza WRX STI Limited Hatchback
2013 Subaru Impreza WRX STI Limited Hatchback
2014 Subaru Impreza WRX STI Limited Hatchback
WRX STI Limited Sedan
2011 Subaru Impreza WRX STI Limited Sedan
2012 Subaru Impreza WRX STI Limited Sedan
2013 Subaru Impreza WRX STI Limited Sedan
2014 Subaru Impreza WRX STI Limited Sedan
WRX STI Sedan
2011 Subaru Impreza WRX STI Sedan
2012 Subaru Impreza WRX STI Sedan
2013 Subaru Impreza WRX STI Sedan
2014 Subaru Impreza WRX STI Sedan
WRX STI Special Edition Hatchback
2010 Subaru Impreza WRX STI Special Edition Hatchback
WRX Sedan
2008 Subaru Impreza WRX Sedan
2009 Subaru Impreza WRX Sedan
2010 Subaru Impreza WRX Sedan
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WRX TR
2006 Subaru Impreza WRX TR
2007 Subaru Impreza WRX TR