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  See more parts for Subaru Impreza
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Private Label Mfg PLM Precision Works Cylinder 4 Coolant Mod for Subaru WRX STI EJ 2002+ - PW-COOLANT-MOD-SUB

If you're diving into the world of Subaru engines, you know that keeping things cool is key—especially when it comes to the infamous cylinder 4. That’s where the Precision Works Cylinder 4 Coolant Mod steps in. This isn't just another aftermarket part; it's a solution born from the minds of true car enthusiasts who understand the passion behind every rev and every corner.

So, what’s the deal with this mod? First off, it’s designed to boost coolant flow directly to cylinder 4. This means you’re not just helping to keep temperatures in check; you’re also leveling things out across all cylinders. Less temperature variation means less chance of knock and detonation, which is something every Subaru owner wants to avoid. And let’s be real—nobody wants to deal with ring land failures. This mod helps keep that nightmare at bay.

Now, let's talk materials. We’re looking at 6061 billet aluminum here, which is tough as nails but lightweight. The precision CNC machining ensures a perfect fit—no awkward gaps or leaks. Plus, it comes with a multi-layer silicone hose that can handle the heat, and stainless steel clamps that won’t back down from a little pressure. It’s built to last, just like your Subaru.

Features:

  • Increased flow to cylinder 4 for better cooling
  • Even temperature distribution across all cylinders
  • Reduced risk of knock and detonation
  • Prevents ring land failure, keeping your engine healthy
  • Made from durable 6061 billet aluminum
  • Precision CNC machined for a snug fit
  • Includes a multi-layer silicone hose
  • Stainless steel clamps for secure installation

Fitment:

  • Subaru EJ20 EJ25 Engines
  • Subaru WRX (2002-2014)
  • Subaru STI (2004+)

This mod fits perfectly in your 2004-2024 Subaru STI or your 2002-2014 WRX, making it a solid upgrade for those looking to push their engines a bit harder without the fear of overheating. If you’re serious about your ride, this is one part you won’t want to skip.

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle Make/Model
Subaru Impreza 2002-2011 WRX
Subaru Impreza 2004-2012 WRX STI
Subaru Impreza 2006-2007 WRX TR
Subaru Impreza 2006-2007, 2010-2011 WRX Limited
Subaru Impreza 2007, 2011-2012 WRX STI Limited
Subaru Impreza 2009-2011 WRX Premium
Subaru Impreza 2010 WRX STI Special Edition
Subaru Impreza 2010 WRX SE
Subaru Impreza 2010 WRX GT
Subaru WRX 2012-2014 Base
Subaru WRX 2012-2014 STI
Subaru WRX 2013-2014 Limited
Subaru WRX 2014 SE
Subaru WRX STI 2013-2021 Base
Subaru WRX STI 2013-2014, 2017-2021 Sport-tech
Subaru WRX STI 2014 Tsurugi Edition
Subaru WRX STI 2015-2021 Limited
Subaru WRX STI 2015 Launch Edition
Subaru WRX STI 2016 Series.HyperBlue
Subaru WRX STI 2017-2021 Sport
Subaru WRX STI 2018 Type RA
Subaru WRX STI 2018-2021 STI
Subaru WRX STI 2019 S209
Subaru WRX STI 2020 Kanrai Edition

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