Will these fit a 2009 subaru wrx?

Yes these will fit as i also use them in my 2009 wrx. Do not use unless you are at a minimum of 100 hp over stock though as it could hurt performance and fuel economy. These are NOT pre gapped for our Subaru WRX . Take your time and gap these plugs . Do not gap below .024 . I run a built motor and even before that i was pro tuned on both 91,93 and E85. Full bolt ons , headers, fuel pump, intake, hks blow off, blouch 20 G turbo and full 3 in back exhaust. Hybrid speed density . I still run them at .026 gap. Works very well for me.

Are these one step colder ?

Yes these are 1 heat range colder

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Iridium IX Spark Plug LFR7AIX # 2309 PK4

Product ID: 261588337

Details

Brand
NGK
Core material
Iridium
Thread size
14mm x 1.25mm
Top material type
iridium
Vehicle service type
Car Truck

💨Copper core for efficient heat removal

🔥Pure alumina silicate ceramic insulator for heat transfer

⚙️Trivalent metal plating for anti-corrosion

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€ 97.52

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Ignite your drive with precision and power!

FLASHOVER PREVENTION - Innovative corrugated ribs design effectively stops flashover, enhancing ignition reliability every time.
UNMATCHED DURABILITY - Trivalent metal plating ensures long-lasting anti-corrosion and anti-seizing performance, keeping your engine running smooth.
SUPERIOR HEAT MANAGEMENT - Pure alumina silicate ceramic insulator delivers exceptional strength and optimal heat transfer to prevent overheating.
TRUSTED QUALITY FROM JAPAN - NGK’s Iridium IX spark plugs, made in Japan, backed by a 4.7-star rating and top-tier automotive performance ranking.
PRECISION FIT PERFORMANCE - Vehicle-specific fit with a 0.04-inch gap size guarantees perfect ignition and maximum fuel efficiency.

The NGK Iridium IX Spark Plug LFR7AIX #2309 PK4 is a premium automotive ignition component featuring trivalent metal plating for superior corrosion resistance, a pure alumina silicate ceramic insulator for enhanced heat transfer, and a copper core for efficient heat dissipation. Designed for vehicle-specific fit and optimal performance, these spark plugs deliver reliable ignition, improved fuel efficiency, and long-lasting durability, making them a top choice for professional-grade automotive maintenance.

Specifications

ASIN	B003RYMPUY
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#15,371 in Automotive ( See Top 100 in Automotive ) #60 in Automotive Performance Spark Plugs
Brand Name	NGK
Compatible with Vehicle Type	Car, Truck
Core Material	Iridium
Customer Reviews	4.7 4.7 out of 5 stars (435)
Gap Size	0.04 Inches
Included Components	2309
Item Weight	0.01 Ounces
Manufacturer	NGK
Manufacturer Part Number	LFR7AIX
Model Number	2309
OEM Equivalent Part Number	FORD%1505812
Thread Size	14mm x 1.25mm
Top Material Type	iridium
UPC	087295023099
Unit Count	4 Count

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