Cobb Subaru WRX/STI/Legacy GT/FXT 2.5L Spark Plugs 4pk (Must Be Purchased w/Power Packages ONLY)-COBB-COBBD44700
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Cobb Subaru WRX/STI/Legacy GT/FXT 2.5L Spark Plugs 4pk (Must Be Purchased w/Power Packages ONLY)

COBB
COBBD44700
Spark Plugs
20+ Units In Stock - Ships Next Business Day
COBB, Engine, Ignition, Spark Plugs
$ 65.00
$ 65.00

SKU: BD44700

Cobb NGK Heat Range 7 Spark Plugs 4-Pack 2002-2021 Subaru WRX STI Legacy GT Forester XT 2.5L Turbo

Cobb D44700 delivers the official NGK one-step-colder heat range 7 iridium spark plugs for all 2.5L turbo Subaru EJ engines in WRX, STI, Legacy GT, and Forester XT models. These pre-gapped plugs ensure reliable ignition under high boost levels, prevent detonation, and support tuned power gains when paired with Cobb Power Packages. Ideal for enthusiasts running Stage 2 or higher upgrades.

Key Features

  • NGK Heat Range 7: One step colder than stock to handle high-boost and tuned setups without pre-ignition
  • Iridium Construction: Fine-wire electrode for extended life up to 100,000 miles and consistent ignitability
  • Pre-Gapped: Factory-set to 0.028" per Cobb specs for plug-and-play installation
  • M14 x 1.25 Thread: Precise 25mm reach matches EJ25 turbo cylinder heads perfectly
  • Japan-Made Quality: NGK manufacturing ensures durability under E85 and extreme conditions

Product Notes

  • Required for warranty on Cobb Stage 2 or higher Power Packages
  • Fits all 2.5L turbo EJ engines; not compatible with FA20 or FA24 engines
  • Ships in official Cobb Tuning retail packaging, typically 6x4x1 inches

Installation Notes

  • Professional installation recommended.
  • Torque to 18 ft-lbs with anti-seize on threads to prevent galling
  • Compatible with stock coils; installation time 30-60 minutes

This Part Fits

Year Make Model Submodel
2004-2021 Subaru WRX STI
2002-2007 Subaru WRX Base
2008-2014 Subaru WRX Hatch/Sedan
2005-2009 Subaru Legacy GT
2004-2013 Subaru Forester XT

Why Choose Cobb?

  • Official plugs specified for Cobb Stage 2+ Power Packages worldwide
  • NGK as the leading spark plug maker trusted by OEMs and racers
  • Engineered for proven performance on high-boost and E85 fuel

Frequently Asked Questions

  • Q: Can these be used without a Cobb Power Package?
    A: Yes for general tuning, but required for warranty coverage on Stage 2+ packages.
  • Q: Are they pre-gapped for immediate use?
    A: Yes, gapped to Cobb's 0.028" spec; do not adjust gap.
  • Q: Do they fit newer FA20 WRX models?
    A: No, FA20 requires Cobb D44701; these are EJ25 turbo only.

Shipping & Handling

  • Method: UPS/FedEx Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Official Cobb box, 6x4x1 inches
  • Weight: 0.4 lbs

Request For Information

Have questions about Cobb Subaru WRX/STI/Legacy GT/FXT 2.5L Spark Plugs 4pk (Must Be Purchased w/Power Packages ONLY)? Fill out the form below and we'll get back to you by the next business day.
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