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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 | 75 Q&As
Part # LFR7AIX-GRP
$44.80
msrp: $73.24

In stock! Ships same day

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 11 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  12 months ago
4out of 5stars

Pre gapped plugs. Worked as advertised.
  
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Good plugs 1 year 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  1 year 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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 1 year ago
5out of 5stars

  
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QUESTIONS & ANSWERS

  • Q: one step colder ngk  leo3 months ago

    i have a 2006 wrx running ots map stage 3 93 pump vf39 turbo, sti tmic,cobb intake, magnaflow catless exhaust with downpipe i haven’t dyno so i dont know my whp or anything so my question is would this spark plugs would be a good choice for the setup i have or its not enough power so i should stick with the regular oem plugs? thanks
  • Q: WRX 2013  Poronguero4 months ago

    Have a 2013 WRX simple tuned with 340 bhp. 3” downpipe + HKS intake. Would this plugs be a good addition to my car? Should I stay with OEM plugs?
  • Q: 2016 Subaru WRX STI - Spark Plug  Scott Moen4 months ago

    I am about to get my 60,000 mile maintence which includes new spark plugs. It is close to a stock set-up with the on mod being a Cobb cold air intake. I will be purchasing the Cobb stage 1 computer to run a different tune. I would like to take advantage of the 60,000 mile maintenance and put in the best plugs I can. What would you recommend?
  • Q: Would these spark plugs fit my 2014 fiesta ST straight out of the box?  Andrew5 months ago

    would I be able to install these spark plugs myself without any altering to the vehicle of the plugs? Also would there be any cons of putting these in a stock car i plan to mod?
  • Q: 2017 Sti  Eulises5 months ago

    Would these be ok with a stage 2+ tune? Mods atm: catted Dp, intake, cobb 1050 injectors , ebcm & IAG Aos

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2004 Subaru Impreza WRX STI
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WRX STI Special Edition Hatchback
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