• COBB One Step Colder Spark Plug Set | Subaru WRX/STI/Legacy GT/Outback XT/Forester XT (D44700)
  • COBB One Step Colder Spark Plug Set | Subaru WRX/STI/Legacy GT/Outback XT/Forester XT (D44700)
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COBB One Step Colder Spark Plug Set | Subaru WRX/STI/Legacy GT/Outback XT/Forester XT (D44700)

COBB One Step Colder Spark Plug Set | Subaru WRX/STI/Legacy GT/Outback XT/Forester XT (D44700)

D44700

In stock

$65.00 USD
$65.00 USD $65.00 USD
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The COBB Spark Plug Set One Step Colder is a high-quality ignition component designed to optimize engine performance for select Subaru models. These spark plugs feature a heat range that is one step cooler than factory units, improving combustion efficiency and reducing the risk of detonation under higher boost or tuning conditions. Originally installed in the 2018 Subaru WRX STI Type RA and 2019 WRX STI, these plugs provide a precise fit and reliable operation. Manufactured to OEM standards, they ensure consistent spark delivery and durability, making them ideal for enthusiasts seeking a dependable upgrade that supports enhanced engine tuning and longevity.

This spark plug set is compatible with Subaru models including the 2006–2014 WRX, 2004–2021 STI, 2005–2009 Legacy GT, 2005–2009 Outback XT, and 2004–2013 Forester XT. Designed as a direct replacement for factory spark plugs, installation is straightforward with no modifications required. These plugs are suitable for street and performance applications where a cooler heat range is beneficial, such as tuned or boosted engines. The set includes all necessary plugs for a full engine replacement, ensuring optimal ignition performance and improved engine smoothness across the specified Subaru platforms.

Overview

COBB Spark Plug Set One Step Colder

Fitment: 2006-2014 WRX / 2004-2021 STI / 2005-2009 Legacy GT / 2005-2009 Outback XT / 2004-2013 Forester XT

Part #: D44700

Overview

The COBB Spark Plug Set One Step Colder is a high-quality replacement spark plug designed specifically for a range of Subaru models including WRX, STI, Legacy GT, Outback XT, and Forester XT. This spark plug is engineered to provide a cooler heat range by one step compared to factory plugs, helping to optimize combustion and reduce the risk of pre-ignition or detonation under demanding driving conditions.

Ideal for tuners and enthusiasts seeking reliable ignition performance, these plugs are the same type installed in the 2018 Subaru WRX STI Type RA and 2019 Subaru WRX STI. They offer a straightforward upgrade or replacement option that removes guesswork from selecting the correct heat range, supporting smoother engine operation and consistent power delivery.

Key Features

Designed to deliver dependable ignition performance, this spark plug set includes:

  • One-step colder heat range for improved thermal management
  • Factory-style design matching OEM specifications
  • Reliable spark delivery for consistent engine operation
  • Durable construction to withstand high-performance conditions
  • Direct fitment for multiple Subaru turbocharged models
  • Off-the-shelf availability for easy replacement or upgrade

Installation & Fitment

This spark plug set is designed for direct fitment in specified Subaru models, making installation straightforward for experienced mechanics and enthusiasts alike. Fitment should be verified against your vehicle’s model year and engine specifications to ensure compatibility. Using the correct heat range plug helps maintain optimal engine temperatures and supports tuning efforts.

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