Mishimoto High-Pressure 1.3 Bar Radiator Cap – Small – One-Way

SKU: MMRC-13-ONWY | UPC: 840197725412

Mishimoto High-Pressure 1.3 Bar Radiator Cap – Small – One-Way Subaru 2004-2024

The Mishimoto High-Pressure 1.3 Bar Radiator Cap raises cooling system pressure above stock in Subaru WRX STI Impreza Forester Outback Crosstrek Baja Legacy models 2004-2024. This design keeps coolant inside the radiator during aggressive driving and turbocharged boosts to avoid overflow and maintain stable temperatures. One-way valve provides OEM function with simple direct-fit installation on factory necks.

Key Features

• 1.3 Bar (19 PSI) Pressure Rating: Holds coolant in radiator under high boost and heat for consistent temperatures in EJ25 turbo engines
• One-Way Valve Design: Vents excess pressure to reservoir while sealing system to match factory Subaru cap performance and flow
• Direct-Fit Installation: Secures to Subaru radiator necks without tools adapters or modifications for fast swap
• Anodized Billet Aluminum Build: Corrosion-resistant construction with laser-etched Mishimoto logo delivers lasting strength
• Non-Directional Logo Sticker: Positions perfectly regardless of orientation for professional engine bay appearance

Product Notes

• Compatible with stock Subaru overflow tanks and hoses
• Direct replacement for turbo EJ25 engines with pressure buildup issues
• Packaged in secure Mishimoto retail box for transit protection

Installation Notes

• Professional installation recommended.
• Twist off stock cap and install when engine fully cool
• Fits all factory radiator necks no adapters required

This Part Fits

Year	Make	Model	Submodel
2004-2006	Subaru	Baja	Sport
2004-2006	Subaru	Baja	Turbo
2018-2024	Subaru	Crosstrek	Base
2019-2023	Subaru	Crosstrek	Hybrid
2018-2024	Subaru	Crosstrek	Limited
2018-2024	Subaru	Crosstrek	Premium
2021-2024	Subaru	Crosstrek	Sport
2024	Subaru	Crosstrek	Wilderness
2005	Subaru	Outback	i
2005	Subaru	Outback	Limited
2005-2006	Subaru	Outback	XT
2005-2009	Subaru	Outback	XT Limited
2017-2018	Subaru	WRX	Base
2017-2018	Subaru	WRX	Limited
2017-2018	Subaru	WRX	Premium
2015-2021	Subaru	WRX STI	Base
2006-2007	Subaru	Impreza	WRX Limited
2010-2011	Subaru	Impreza	WRX Limited
2009-2011	Subaru	Impreza	WRX Premium
2004-2014	Subaru	Impreza	WRX STI
2007	Subaru	Impreza	WRX STI Limited
2011	Subaru	Impreza	WRX STI Limited
2006-2010	Subaru	Forester	XT Limited
2005	Subaru	Forester	XT Premium
2010-2013	Subaru	Forester	XT Premium
2011-2013	Subaru	Forester	XT Touring
2009-2010	Subaru	Impreza	2.5 GT
2006-2011	Subaru	Impreza	2.5i
2010-2011	Subaru	Impreza	2.5i Premium
2005-2006	Subaru	Legacy	GT
2005	Subaru	Legacy	GT Limited
2007-2009	Subaru	Legacy	GT Limited
2006-2009	Subaru	Legacy	GT spec.B
2005	Subaru	Legacy	i
2005	Subaru	Legacy	Limited
2010-2012	Subaru	Legacy	2.5GT
2006-2012	Subaru	Legacy	2.5i
2002-2014	Subaru	Impreza	WRX

Why Choose Mishimoto?

• Lifetime warranty covers defects in materials and workmanship
• Engineered with dyno and track testing for Subaru reliability
• Precision CNC-machined components ensure exact OEM fitment

Frequently Asked Questions

• Q: Does this cap fit 2015-2021 Subaru WRX STI models?
  A: Yes direct fit for 2015-2021 WRX STI Base Limited Launch Edition and other variants
• Q: What materials are used in construction?
  A: Black anodized billet aluminum body with stainless steel valve and laser-etched logo for strength and style
• Q: What warranty is included?
  A: Mishimoto Lifetime Warranty protects against manufacturing defects when installed and used properly

Shipping & Handling

• Method: UPS Ground or USPS Priority
• Availability: In stock – ships same or next business day
• Packaging: Mishimoto retail box 3.98 x 2.99 x 1.73 inches
• Weight: 3.2 oz (0.2 lbs)