Heating and Cooling› Radiators

Koyorad

Hyper Core Series Aluminum Racing Radiator

$386.87

SKU: KH011937-KOYO

Special Order
Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Koyorad KH011937 is a 1" Hyper Core Series aluminum racing radiator designed as a direct replacement for the factory plastic tank radiators in 2006-2013 Lexus IS250 and IS350 models with automatic transmissions.

Constructed from all-aluminum and precision TIG welded, this radiator offers improved performance and durability. Its 1" thick, high-density Hyper core provides over a 50% increase in thickness compared to OEM radiators, enhancing heat capacity and endurance.
Show original supplier description
The Koyorad KH011937 is a high-performance, all-aluminum racing radiator engineered to replace the stock plastic tank radiator in 2006-2013 Lexus IS250 (2.5L V6) and IS350 (3.5L V6) models equipped with automatic transmissions. Featuring a 1" thick, high-density Hyper core with high-efficiency louvered fins, this radiator offers a significant increase in heat capacity—over 50% thicker than OEM units—providing better cooling reserve. The construction utilizes Nocolok™ brazing and precision TIG welding, ensuring a robust and reliable core. The radiator boasts a brushed aluminum finish and includes CNC machined aluminum filler neck and drain plug for convenience. Koyorad emphasizes quality through rigorous testing, including three individual pressure tests, and oversees production in their privately owned factories to maintain high standards. Fitment is specific to Lexus IS250 and IS350 models from 2006 to 2013 with automatic transmissions. The manufacturer recommends professional installation for optimal results.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandKoyorad
Part NumberKH011937-KOYO
CategoryHeating and Cooling
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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