Description
Compact Efficiency. Proven Performance. Made in the USA.
The MHX-221C is a high-efficiency oil cooler designed specifically for street and strip C6 Corvettes. Developed through years of>
Performance & Design
This double-pass cooler maximizes heat extraction in a compact footprint. It matches the cooling capacity of the massive factory C6 Z06 oil cooler but does so in a significantly smaller package. This smaller surface area is a critical advantage for the C6 chassis: it minimizes airflow obstruction to the radiator, helping to lower engine coolant temperatures compared to the large factory Z06 unit.
Application
This cooler is the ideal solution for:
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High-Horsepower Street/Strip Cars (600+ HP): Excellent oil temp management for short bursts and street driving.
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Light Track Duty (160-250 HP): Suitable for lower horsepower vehicles seeing sustained road course use.
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(Note: For dedicated high-horsepower road course track cars, we recommend upgrading to our larger MHX series coolers.)
Installation & Fitment
Designed with C6 geometry in mind, the mounting bungs on the left side align with the factory radiator shroud mounting locations.
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Lines: This cooler uses standard -10AN ports and is not compatible with factory GM oil lines. You must use aftermarket -10AN lines and an oil cooler adapter.
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Mounting: While the left side utilizes factory mounting points, an additional mounting bracket is required to support the right side of the cooler (sold separately).
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Complete Kit: For a hassle-free install, we recommend purchasing our complete C6 Oil Cooler Kit (Part EC6-603), which includes this cooler, all brackets, and lines.
Every Improved Racing oil cooler is pressure tested to 175 PSI to ensure leak-free performance and rated for continuous operation at 150 PSI. We engineer, manufacture, and test our products in the USA, backing them with a Lifetime Warranty.
Features and Benefits
- Similar heat rejection rate to factory C6 Z06 oil cooler.
- Smaller footprint allows more air to reach the radiator, lowering coolant temperatures.
- Double-pass design to maximize efficiency.
- Higher pass-through airflow rate compared to traditional stacked plate coolers.
- -10AN male ports on same side of end tank.
- 4x flanged M8 mounting screws are included.
- Made in the USA and backed by a lifetime warranty.
Applications and Fitment
- 2005-2013 Chevrolet Corvette (C6), all models.
- NOTE: Vehicles equipped with a factory water to oil heat exchanger will require capping off the factory water line connections.
- NOTE: Requires aftermarket oil cooler lines and oil cooler adapter, or use Improved Racing’s complete bolt-on oil cooler kit (see part number EC6-603).
Dimensions and Specifications
Note: Mounting bungs not shown in drawing.
| Part | Rows | HP Range | Fittings / Ports | Weight | Capacity | Mounting Holes |
| MHX-221C | 21 |
160-250 HP (Road Course Use) 600+ HP (Street/ Strip) |
-10AN 37° Male Flare | 2.8 lb (1.3 kg) | 0.95 Qt (0.90 L) | M8 x 1.25, mounting bung standoffs (not shown) |
