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GrimmSpeed

GrimmSpeed Radiator Cap Black Type A (1.3 Bar) For Subaru

MPN: 113061a Catalog #: 001858638 Category: Radiator Caps Check Vehicle Fitment

Product Details

Optimize Your Subarus Cooling System Without Breaking the Bank! Lets face it engine cooling technology can sometimes seem like a dark magic that is impossible for us mortals to understand. That being said, it is well known that raising the pressure in your cooling system has a direct correlation to cooling performance.

The factory 1. 1 Bar (16 PSI) cap performs fine for daily driving with a system full of anti-freeze, but for those who are looking to push their Subaru harder or run on the track may be running an anti-freeze/water blend (or in many cases just straight distilled water) as it provides better heat transfer and dissipation than your standard coolant or antifreeze.

The downside to running water or a blend of antifreeze/water is a lower boiling point and thus you would easily fill up (and in some cases overflow) your expansion tank within a couple of hot laps. Upgrading the radiator cap to one with a higher pressure rating is the easiest (and by far the Most economical) solution for solving this issue and keep your cooling fluid of choice where it belongs in your engine and radiator.

The GrimmSpeedHigh Pressure 1. 3 Bar Radiator Cap is a high quality and way to maximize your cooling systems potential and upgrade the looks under your hood without breaking the bank!

Quick Specs

Fitment:All Subaru Radiators and/or Expansion Tanks Many (but Not all) Nissan, Mitsubishi, Honda, Mazda, and Toyota Models

Fitment Note Not suited to replace the 1-way earless cap on the STI radiators, but will work perfectly on the upper expansion tank!

Installation couldnt be easier! Just twist the factory cap a little Over half a turn counter-clockwise with remove and replace with your new GrimmSpeed Cap! Ensure that your engine is cool before Installing. Never remove your radiator cap immediately after driving your vehicle!

Quick Specs

  • 1. 3 Bar/18. 9 PSI Pressure Rated
  • Increases Cooling System Efficiency
  • Electro-coated
  • Stamped Steel Construction
  • Heavy-Duty Silicone Seal Understated Look
  • Eliminates Ugly OEM Yellow Badge Manufactured in Japan

Fitment:All Subaru Radiators and/or Expansion Tanks Many (but Not all) Nissan, Mitsubishi, Honda, Mazda, and Toyota Models

Vehicle Fitment

Universal or product-specific fitment. Please review the product details and contact us if you need help confirming fitment before ordering.

Product Specs

Brand
GrimmSpeed
Part Number
113061a
Catalog Number
001858638
Product Line
Radiator Caps
Category
Cooling
Type
Radiator Caps
UPC / Barcode
850037989867
Weight
0.20 lb
Freight / LTL
No

Shipping & Availability

Current status 10 Available - Ready to ship
Estimated timing Usually ships within 24hrs

This item is showing available inventory. Most in-stock performance parts ship quickly, but timing can vary by warehouse, vendor cut-off time, holidays, and carrier pickup.

Inventory shown: 10 available as of 6/4/2026.

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