$31.00
Buy Now, Pay Later
As low as
$7
/ mo
Learn more
- – 4-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
Only 7 left in stock, order soon!
Arrives
Monday, Nov 9
Recently Viewed
At a glance
- Condition
- New
- Model
- SK-C13
- Dimensions
- 5 x 3 x 2 in
- Weight
- 1.76 oz
- Color
- Red
- Material
- Aluminum, Brass
- Exterior Finish
- Painted
- In the box
- Radiator Caps
Features 1
- Hyper Red Radiator CapFor All Koyo Radiators1.3kgf/cm Pressure RatingHyper Red Radiator CapFor All Koyo Radiators1.3kgf/cm Pressure RatingCan you handle the pressure The Koyorad hyper Radiator Cap isfor intelligent tuners who demand to extract every ounce of coolingefficiency from their performance machines. Koyorad highlyrecommends our 1.3 bar Koyorad Hyper Cap (Koyo part numberSK-C13) for use with Koyorad All AluminumRacing Radiators (when applicable). The Koyorad Hyper Cap is madein Japan wit
Description
Koyo Quality begins with our selection of premium OE grade materials such as: aluminum, copper, brass, and plastics. Koyo products are not only developed and tested to be resilient to harsh outside elements, but also years of under- hood heat cycling as well.
Specs 25
| Brand | Koyo |
|---|---|
| Color | Red |
| Material | Aluminum, Brass |
| Exterior Finish | Painted |
| Item dimensions L x W x H | 5 x 3 x 2 inches |
| Brand Name | Koyo |
| Model Number | SK-C13 |
| Manufacturer Part Number | SKC-13 |
| Number of Items | 1 |
| Number of Packs | 1 |
| OEM Equivalent Part Number | SK-C13 |
| Manufacturer | Koyo |
| UPC | 847839000753 |
| Global Trade Identification Number | 53 |
| Unit Count | 1 Count |
| Item Type Name | Radiator Caps |
| Part Interchange Info | SK-C13 |
| Manufacturer Warranty Description | Manufacturer Warranty |
| Style Name | Brass |
| Material Type | Aluminum, Brass |
| Item Dimensions | 5 x 3 x 2 inches |
| Item Weight | 1.76 ounces |
| Compatible with Vehicle Type | Car, Motorcycle |
| Automotive Fit Type | Vehicle Specific Fit |
| Closure Type | Twist-On |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Nov 9
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- Zip Pay in 4
- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Fixes stock Hot-Run issue with WRX
The WRX stock has a radiator cap that keeps engine hotter than necessary. This is for emissions only and robs power & response. Best $40 bucks you can spend
Reviewed in the United States on December 9, 2024 by Aesir11D
$$$ but good.
Fits my koyorad radiator perfectly. It's expensive but it's quality.
Reviewed in the United States on March 4, 2026 by D S
Research Your Car First
Make sure your car can handle this. If you still have stock rubber hoses, they WILL split somewhere and cause a rapid coolant flush.
Reviewed in the United States on August 19, 2026 by Da'Naque Leagan
Does what it's supposed to, high quality part.
So far so good. Works as intended on my 07 350z. Good build quality. This is one of those kinds of parts that it either works well or it doesn't, this fits my car and does what it's supposed to. Highly recommend, I have a Koyo solid aluminum radiator too, so take that into consideration as well. Radiator is significantly better than the stock one as well, so I recommend that as well.
...
show more
Reviewed in the United States on March 2, 2020 by Kevin Delaney
Fits perfect
So far so good.
Reviewed in the United States on April 13, 2026 by Local Buyer
Ten Years Service and Counting on my Turbo Miata Track Car
I have used this cap on a Koyo radiator in my Turbo Miata track car since 2016. It has never leaked or given me any trouble, and the silicone seal inside is still in great physical condition and is still pliable. Let's see if it can go another 10 years.
Reviewed in the United States on January 30, 2026 by S. Scott
Got the job done
Did it’s job and has held up well so far
Reviewed in the United States on February 1, 2025 by Audrey Rae
I don't trust it
Did not come in official packaging, just a plastic bag with the sticker not even on it. I can’t personally trust it. It could be a way of saving money I guess, but it’s already an expensive radiator cap. If I’m going to pay a premium for an official Koyorad cap, I want the official Koyorad packaging.
...
show more
Reviewed in the United States on May 24, 2026 by Matt M.