SKU: 56829653886

Koyo Hyper Cap, (Fits All Listed Koyo Radiators), 1.3 Bar, Red Racing Radiator Cap

Sale price$53.10 Regular price$59.00
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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16

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Description

Koyo Hyper Cap, (Fits All Listed Koyo Radiators), 1.3 Bar, Red Racing Radiator CapPart # SK C13 (RED) Deep plunger fits all Koyorad radiators w filler necksPart # SK D13 (Bottom photo BLUE) Shallow plunger fits FR S, BRZ, and GT86 Extract every ounce of cooling efficiency from Koyorad All Aluminum Performance Radiators with a genuine Koyorad Hyper Cap! This Koyorad Hyper Cap withstands an increased valve pressure rating of 1. 3kgf cm2 (1. 3 bar) (18. 9 psi) (130 kPa) which increases the boiling point of water and relieves high

Part # SK-C13 (RED) Deep plunger fits all Koyorad radiators w/ filler necks
Part # SK-D13 (Bottom photo BLUE) Shallow plunger fits FR-S, BRZ, and GT86

Extract every ounce of cooling efficiency from Koyorad All Aluminum Performance Radiators with a genuine Koyorad Hyper Cap!  This Koyorad Hyper Cap withstands an increased valve pressure rating of 1.3kgf/cm2 (1.3 bar) (18.9 psi) (130 kPa) which increases the boiling point of water and relieves high-performance engines of excessive heat.   A genuine Koyorad Hyper Cap is recommended for use with every Koyorad All Aluminum Performance Radiator (when applicable).  This Koyorad Hyper Cap is manufactured in Japan from high-quality components to ensure longevity and performance from your Koyorad Racing radiator.

Why is increased Pressure Better?

It’s simple.  When water is pressurized, its natural boiling point is increased.  Most modern vehicles are equipped with a 0.9 Bar pressure cap.  Koyorad’s Hyper Cap is rated at 1.3 Bar which increases the boiling temperature of your coolant to 267.80 degrees Fahrenheit.  That is nearly a 56-degree increase over water's normal boiling point.  By increasing the boiling point of water, an engine's cooling system will have the added heat capacity, maximizing performance under ever-changing racing conditions.

 


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 56829653886

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4.3 ★★★★★
Based on 102 reviews
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Product Reviews
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Verified Purchase
Sal
Fort Morgan, US
★★★★★ 5
Direct Fit and good quality
Color: Single Slat Gloss Black, Size: 2002-2005 E46
For anyone that has owned an E46 knows that even the stock kidney grills are brittle plastic. This aftermarket is about the same quality as stock. It is a direct fit and has the clips where they are supposed to be to keep them in place. The look is also pretty nice. This one is all black and actually looks nice on my black E46. I would recommend especially for the price and shipping was fast.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 29, 2025
C
Verified Purchase
Christian Burt
New York, US
★★★★★ 5
Easy install
Color: Single Slat Gloss Black, Size: 2023+G20
Fits well. Made of plastic but very easy install.
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Reviewed in the United States on March 19, 2026
M
Verified Purchase
Mecha Drew
Alexandria, US
★★★★★ 1
I should have read all the other reviews ...
Color: Single Slat Gloss Black, Size: 2010-2013 E92, Color: Single Slat Gloss Black, Size: 2010-2013 E92
I read all the bad reviews, but I gave it a shot anyways Tabs wont clip in place and fitment is slightly off.
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Reviewed in the United States on May 1, 2026
C
Verified Purchase
Charles Sherin
Draper, US
★★★★★ 5
Worth it
Color: Single Slat Gloss Black, Size: 2006-2009 E92
For perfect and looks great
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Reviewed in the United States on February 5, 2026
M
Verified Purchase
Madison
Lowell, US
★★★★★ 5
Very nice quality
Color: Single Slat Gloss Black, Size: 2019-2022 G20
I have a 2022 330i bmw and it fit perfectly! Looks just like photos online and delivered quick!
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Reviewed in the United States on August 27, 2025

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