Name: Mishimoto 12-15 Honda Civic Si Performance Radiator
Brand: Mishimoto
SKU: MISMMRAD-CIV-12SI
Price: 399.95 USD

Mishimoto 12-15 Honda Civic Si Performance Radiator

Mishimoto
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Mishimoto 12-15 Honda Civic Si Performance Radiator

Mishimoto
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SKU: MISMMRAD-CIV-12SI
Barcode: 840197727058

Upgrade the cooling system of your 2012-2015 Honda Civic Si with this Mishimoto Performance Aluminum Radiator, built to manage the... Read more

Out of stock, 1-3 weeks

$440.00 $399.95

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No hassle returns, 15 days return

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Shop now and pay over time with Shop Pay Installments at Gearhead Motoring. Get the performance parts, wheels, suspension, and accessories you need today with flexible payment options and a fast, easy checkout. Upgrade your ride now and pay at your pace.

Shipping and Returns

We are committed to providing a fast, reliable, and hassle-free shopping experience. Every order is carefully packaged to ensure it arrives safely and in perfect condition.

Fast & Free Shipping

Most orders are processed and shipped within 1 business day, with delivery typically taking 1–4 business days. We proudly offer FREE shipping throughout the contiguous 48 United States on qualifying orders.

Easy Returns & Exchanges
Your satisfaction is important to us. If you're not completely happy with your purchase, you may return or exchange eligible items within 15 days of receiving your order. Items must be unused, in their original packaging, and in resalable condition to qualify for a return or exchange.

Shop with confidence knowing that we're here to help every step of the way.

Description

Upgrade the cooling system of your 2012-2015 Honda Civic Si with this Mishimoto Performance Aluminum Radiator, built to manage the sustained thermal output of a high-revving K-series engine on the street and the track. All-aluminum construction with precision TIG-welded end tanks outlasts the factory plastic-tanked unit prone to cracking under heat cycling and repeated high-rpm use. A 63% increase in core volume over the OEM radiator delivers greater surface area and thermal capacity, keeping coolant temperatures stable during back-to-back pulls, spirited street sessions, and weekend track days where the stock radiator starts to fall behind.----Designed as a direct-fit replacement for the 2012-2015 Honda Civic Si, this radiator drops in without cutting, fabricating, or modifications, and works seamlessly with all stock hoses and components without alteration. The included high-pressure radiator cap maintains optimal system pressure from the first drive, extracting the full benefit of the upgraded core. The Mishimoto Magnetic Drain Plug catches ferrous metallic debris before it circulates through the cooling system, protecting your K-series engine internals and extending service life beyond what the factory setup allows.----Don't wait for your stock radiator to crack and leave you sidelined. Whether you daily drive your Civic Si, push it hard on weekend canyon runs, or are building toward a higher-output K-series setup, this aluminum radiator handles the sustained thermal demands your factory unit was never built for. Proactive cooling upgrades protect your engine investment - and this one is built to outlast it. Backed by the Mishimoto Lifetime Warranty, this Performance Aluminum Radiator is the last cooling upgrade your 2012-2015 Honda Civic Si will ever need.

This Part Fits:

Year	Make	Model	Submodel
2012-2015	Honda	Civic	Si

Specifications

Type: Aftermarket
Usage: Street Use & Speedway

Why Buy From Us:

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Returns & Delivery

When will my order be delivered?

Delivery typically takes 1–4 business days. After placing your order, you will receive an email with shipping updates, tracking information, and any additional details needed to ensure a smooth delivery process.

Can I return my product?

Orders may be returned or exchanged within 15 days of receiving the parcel, provided the items are in their original, resalable condition. Customers are responsible for return shipping costs unless the return is due to an error made by Gearhead Motoring, in which case we will cover all shipping costs. Please wait for an RMA number and return instructions before sending any item back. Items returned without an RMA will not be accepted.

What can I do if my item (or part of it) is damaged?

Damaged Shipments

If your shipment arrives damaged, whether visible upon delivery or discovered after opening the package, please follow these steps immediately:

Contact Gearhead Motoring as soon as possible and submit a damage claim at shipping@gearheadmotoring.com
Keep all original packaging materials, including the box and packing materials.
Make a list of any damaged or missing items.
Take clear photos of the damaged packaging and the affected products.
If the delivery driver cannot wait for an inspection, or does not allow you to inspect the shipment, write "SUBJECT TO INSPECTION" on the delivery receipt before signing and ask the driver to acknowledge it.

Once we receive the required information, Gearhead Motoring will work directly with the shipping carrier and arrange a pickup if necessary. Do not return any merchandise without prior written authorization and an RMA number from Gearhead Motoring.

After the returned product is received and inspected, we will notify you whether the item will be replaced, or if a refund or store credit will be issued.

Important: By signing and accepting a freight shipment, you may waive your right to file a damage claim for any damage not noted on the delivery receipt. We strongly recommend inspecting all freight shipments upon arrival, even if the outer packaging appears to be in good condition.