![[VIDEO] Keep Your C8 Corvette's Engine Bay Up to 50 Degrees Cooler with these OEM Air Deflectors](https://www.corvetteblogger.com/images/content/2025/11/111925_4.jpg)
When it comes our C8 Corvettes, one of the downsides of having the engine in the rear is that cooling those hot engine components can be a little more difficult. Without proper ventilation, heat from the engine’s headers, catalytic converters, and exhaust can cause heat soak, which can significantly lower your Corvette’s performance and longevity.
So now we are finding out that Corvettes destined for the European market are equipped with an OEM cooling mod straight from the factory, and the benefits of these two easily-installed air deflectors can be significant according to our friend Justin at HorsePower Obsessed and his friend Brandon of Brandon’s Garage, who is credited with the find.
These air deflectors mount under your car and they are designed to route cooler air into your engine bay. It’s somewhat of a head scratcher why these cooling devices are not offered as standard equipment on C8 Corvettes delivered in the USA, but the good news is you can order these parts from your dealer’s parts counter and they are easy to install.
The GM Part Numbers are 85580654 and 85580653. I did a lookup of them on GM Parts Direct and they are called “F Deflectors.” Together, they average around $125 each so roughly $250 for the pair.
These air deflectors are metal components that easily mount using existing hardware on the skid plate under your Corvette, and the scoop design sends cooler air directly into openings of your engine bay where your headers and catalytic converters create some of the most heat.
Justin took his C8 Corvette Z06 to the dealership to pick up these parts and when he returned home, he did some quick readings with an infrared thermometer. Once the air deflectors were installed, he did another round of measurements after a drive and found that it significantly reduced temps around his engine bay:
- Left side carbon fiber engine bay area: 87.8°F (down from 132°F)
- Intake cover: 97.9°F (down from 154.1°F)
- Headers: 186°F (down from 222°F)
- Trunk area: 104°F (down from 146°F)
These results show temperature reductions ranging from approximately 42°F to over 56°F in critical areas.
Check out the video below and you can see just how easy it is to add these to your car.
From HorsePower Obsessed via YouTube:
This video showcases an OEM cooling modification for the C8 Corvette, lowering engine bay temperatures by over 50 degrees. The presenter installs GM air deflectors, originally designed for European models, and tests their impact using a laser thermometer. See how a simple installation dramatically reduces heat.
Source:
HorsePower Obsessed / YouTube
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Definately will look into this. Not that my ’23 runs hot, but cooling air is always welcome, especially given that mine does not see too much highway use.
Thanks!
Someone with connections at GM needs to ask why the European version comes standard with these and not the US spec’ed cars.
@cbj: German C8 owner here, I think we might drive way more often above 120mph here on the Autobahn than you 😉
On a more serious note: The GPF causes addtional heat that needed adjustments
Why, because not spending the money to put these on the thousands of US C8s just boosts Mary’s big bonus.
Punch out a piece of aluminum and bend it a little, charge 1200% markup. Makes sense. Doubting these temp reductions.
I have a 2024 E-ray will this help cool my car?
Wait and the Chinese vendors on eBay will sell them for $10 each!
Nothing new, other forum have been talking about these 2 years ago.
https://www.corvetteforum.com/forums/c8-tech-performance/4752383-does-anybody-know-the-gm-partnumber-for-this-item-3.html
Does not work on the 2024 Stingray. Probably does not work on any C8 Stingray.
These will work on ANY C8 Corvette regardless of what the dealer tells you. It WILL improve temperatures in the E-Ray and Stingray as well as the Z06/ZR1.
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