Log In Cart
Log In

Create An Account

Log In Cart
Your Cart Is Empty
This part is universal and does not have vehicle specific fitment. Please contact us if you need assistance.

Koyo Radiator Cap

Part Number: SK-C13

5 out of 55 out of 55 out of 55 out of 55 out of 5 2 customer reviews
$35.11 USD Free Shipping

Reward Points

It pays to shop with K Series Parts and our reward points program! For every $1.00 you spend you earn reward points.

They are easy to earn, just log in to your account when you check out. If you don't have one it is free and easy to setup.

They are easy to use during check out. Click on the "Have Reward Points?" on the shipping and payment selection page.


Reward Point Program Details

You earn 3 points for every $1.00 that you spend.

100 points equal a $1.00 discount.

Maximum discount per order is 3% of the order total.

There is no minimum order total to redeem points.

Points do not apply to shipping or sales tax.

Points are not redeemable for cash.

The point value per dollar, points earned per purchase, and order minimum are subject to change.

Earn 105 reward points. Learn More


48 In Stock

Description

Designed to fit the Koyo radiator only, Part # SK-C13 Deep plunger fits all Koyorad radiators w/ filler necks

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.

Specifications

Brand: Koyo Radiator
Part Number: SK-C13

Vehicle Fitment

This part does not have vehicle specific fitment


Customer Reviews

5.0 out of 5.0 5 out of 55 out of 55 out of 55 out of 55 out of 5

2 Total Reviews

Add Your Review


Most Recent


5.0 out of 5.0 5 out of 55 out of 55 out of 55 out of 55 out of 5

Nice

By Blake Beard on 9/4/2014

What else can be said? It fits the koyo radiator like a glove and looks great!


5.0 out of 5.0 5 out of 55 out of 55 out of 55 out of 55 out of 5

Koyo Cap for Koyo Radiator Cap

By Kevin Choi on 7/29/2010

it fits only koyo radiator. it worked great~! it's just cap.


Read All 2 Reviews

Add Your Review