1 3

Mishimoto One Way High-Pressure 1.3 Bar Radiator Cap

SKU: MMRC-13-ONWY

Very Low Stock 1 left

Order within 22 Hours – Ships Tomorrow

£22.80
Klarna Split your purchases into 3 interest-free payments. Pay £7.60 GBP/mo.
18+, T&C apply, Credit subject to status.
  • Description
  • Suitable For

Maximize Subaru performance with the Mishimoto High-Pressure 1.3 Bar Radiator Cap. When pushing a vehicle under demanding driving conditions, the cooling system becomes highly pressurized, often exceeding the limits of stock caps. This leads to coolant loss into the overflow reservoir, compromising performance. Engineered specifically for Subaru vehicles with one-way functionality matching the OEM radiator cap design, this cap guarantees appropriate operation of the cooling system. The Mishimoto cap maintains optimal coolant flow by withstanding higher pressures. Its direct-fit design ensures easy installation, and the unique non-directional sticker means it's always facing the right way. Upgrade any Subaru's cooling system and experience the difference in performance with the Mishimoto High-Pressure Radiator Cap.

Key Features

  • Engineered with one-way functionality matching the OEM radiator cap design, guaranteeing a perfect fit
  • 1.3 bar (19 psi) high-pressure radiator cap raises the boiling point of engine coolant to provide a safer and more efficient cooling system
  • Ergonomically designed for easy removal and installation
  • Non-directional sticker design so it’s never facing in the wrong direction
  • Mishimoto Lifetime Warranty
Overall Height (Inches) 1.00
Installation Notes Allow engine to cool for 30 minutes
Remove existing cap
Install MM radiator cap
Applications Subaru Baja 2.5L H4 2004-2006
Subaru Crosstrek 2.0L H4 2018+
Subaru Crosstrek 2.5L H4 2021+
Subaru Forester 2.0L H4 2014
Subaru Forester 2.5L H4 2004-2013
Subaru Impreza 2.0L H4 2013-2014
Subaru Impreza 2.0L H4 2017+
Subaru Impreza 2.5L H4 2004-2011
Subaru Impreza 2.5L H4 2024+
Subaru Impreza WRX 2.0L H4 2002-2005
Subaru Impreza WRX 2.5L H4 2006-2014
Subaru Impreza WRX STI 2.5L H4 2004-2014
Subaru Legacy 2.5L H4 2005-2012
Subaru Outback 2.5L H4 2005-2009
Subaru WRX 2.0L H4 2017-2018
Subaru WRX STI 2.5L H4 2015-2021
Engine Codes EJ20
EJ25
Weight (Ounces) 1.00
Diameter (Inches) 2.17
Maximum Pressure (PSI) 18.90

Compatible OEM Numbers

  • 2000 to 2007 Subaru Impreza (GDB)
  • 2007 to 2012 Subaru Impreza (GRB)
  • 2007 to 2012 Subaru Impreza (GVB)
  • 2002 to 2008 Subaru Forester (SG9)

Free UK Delivery

When you spend over £100

14 Day Returns

See our Returns Policy for details

Let customers speak for us

from 302 reviews
Dixcel Z Type Brake Pads - Rear - BNR32 (V-SPEC) BCNR33 BNR34 Z33 CP9A CT9A GDB GRB SG9 BP5
C Streat
Dixcel z pads

These are a revelation after PFC z pads. Excellent bite

Dixcel Z Type Brake Pads - Rear - BNR32 (V-SPEC) BCNR33 BNR34 Z33 CP9A CT9A GDB GRB SG9 BP5
Fujitsubo EPU Sports Cat Exhaust System - Swift Sport ZC33S
Harry Hare
Not cheap but quality

Fits like a dream and gives a nice, not ridiculously loud, sporty noise to the car. Very free flowing.

Fujitsubo EPU Sports Cat Exhaust System - Swift Sport ZC33S
Spoon Sports Radiator Cap Type D - K20A B16/B18 F20/F22 L15
Carlyle Astill
Spoon sports Radiator cap EK9

Easy to fit. **** off old cap for new and place the sticker on top.

Spoon Sports Radiator Cap Type D - K20A B16/B18 F20/F22 L15
Hybrid Racing Stainless Steel Competition Shift Rod
Christian
Amazing

fits perfectly on my honda s2000 and very good quality

Hybrid Racing Stainless Steel Competition Shift Rod
Hybrid Racing Short Shifter Assembly - S2000 AP1 / AP2-Red
Anonymous
10/10 looks and

10/10 looks and feels

Hybrid Racing Short Shifter Assembly - S2000 AP1 / AP2-Red
Tein S.Tech Lowering Spring Kit - 370Z Z34
Grant Smith
Great service from Torque Gt

Great service from Torque Gt. Easy to order online, postage was very reasonable and automatically deducted the VAT as I live in the Channel Islands. Springs arrived within a few days. Great price too

Tein S.Tech Lowering Spring Kit - 370Z Z34
Spoon Sports Duracon Gear Knob - 5 Speed
Carlyle Astill
Great product

Great product. Fits straight on in less then a minute. Would recommend this gear knob to anyone thinking of a quick little dress up mod

Spoon Sports Duracon Gear Knob - 5 Speed
Enkei RPF1 Lightweight Alloy Wheel - 18x9 ET35 5x112 F1 Silver
sohrab mohamed
Well - id argue this is one of the best companies

Well - id argue this is one of the best companies to deal with if you want genuine enkei products. Everything was smooth as can be from start to finish. MATT is very professional and was helpful. Id return to use them if I ever wanted the best in service. The wheels I got are 10000% authentic from Japan. Enkei rpf1 wheels fitment for a golf r. Absolutely seamless business with these guys

Enkei RPF1 Lightweight Alloy Wheel - 18x9 ET35 5x112 F1 Silver
Dixcel SD Brake Discs - Rear - FD3S (294mm)
Max Sansom
Good quality rotors and the price is good

Good quality rotors and the price is good.

Also the communication from the torque GT team was very good

Dixcel SD Brake Discs - Rear - FD3S (294mm)
Hybrid Racing Maxim Performance Gear Knob - Grey
Will Lapinskis
Sweet addition to the interior

Fitted to my GE Jazz. Super easy to fit, nice the logos line up 90 degrees to the dash. Good size, not overly big, good weight. Feels great to use.

Hybrid Racing Maxim Performance Gear Knob - Grey
Mugen Livery Folding Storage Container - Large, 50L
Siu Yuen To
Mugen 50L storage container

Great size and excellent quality. The design is clean and stylish, with very fine craftsmanship. Highly recommended!

Mugen Livery Folding Storage Container - Large, 50L
Skunk2 Honda 6 Speed Gear Knob Shift 10mm X 1.5mm
Liam
Fantastic quality product, well packaged and

Fantastic quality product, well packaged and delivered quickly. Perfect fit, looks and feels great. No issues with my shopping experience at all

Skunk2 Honda 6 Speed Gear Knob Shift 10mm X 1.5mm
Spoon Sports Exhaust B Pipe Centre Section - Integra DC5/Civic EP3
Marc
OEM plus Sound

Package arrived promptly and the new B pipe was well protected in bubble wrap inside the factory spoon packaging. The first thing i noticed was the quality of the welds, then the serialised Spoon plaque, and the genuine honda gasket and spring bolt kit which is included. Fitment was straight forward with the right tools, and the spoon piece aligned perfectly with the standard cat and Spoon N1 backbox. The noise i would describe as OEM++. No drone at motorway speeds but in the vtec band it has that raspy race note. Perfect for around town but still fun in the higher rev range when you want to hear your Honda scream.

I rate it 5/5 and would recommend as a replacement for those sadly corroding factory B pipes.

Spoon Sports Exhaust B Pipe Centre Section - Integra DC5/Civic EP3
Spoon Sports Twinblock Brake Caliper Set - Civic Type R EK9
Carlyle Astill
Spoon brake calipers for my EK9

Always wanted to do this modification and now I got the chance as I got some discount. Fitted the new spoon calipers with my friend. Not a direct fit as it says. You have to cut the back plate. Plus if you have standard brake lines. You have to bolt the caliper first then the brake line. If you have standard brake pads. The back one has to have the lugs shaved down. If you have the tools it's easy enough. Took around 3-4hours to fit and bleed. What a transformation though to the feel of the braking. I would recommend these to anyone thinking about it. But take note you will need something to cut and shave metal.

Spoon Sports Twinblock Brake Caliper Set - Civic Type R EK9
Bilstein B4 Replacement Shock Absorber - Accord Tourer CW (2008-2015) - Driver Side, Front
Gromero
I cannot emphasise enough how helpful your guys

I cannot emphasise enough how helpful your guys were. Even after I cocked up and bought the wrong shock they still got another out in the last post and delivered to me the next day.

Bilstein B4 Replacement Shock Absorber - Accord Tourer CW (2008-2015) - Driver Side, Front
Back to top
Reward program

Referral Points

Create an account to claim discount.