DESCRIPTION
UNLEASH THE FULL POTENTIAL OF YOUR C8
For over 20 years, DeWitts Radiator has set the standard in Corvette cooling systems, driven by a commitment to innovation, durability, and race-proven performance. The C8 Corvette is a masterpiece of engineering—but in demanding conditions, even the best machines need an edge. That’s why DeWitts has engineered a complete three-unit Direct Fit™ high-performance radiator package specifically for 2020–Present C8 Corvettes equipped with LT2, LT6, or LT7 engines.
Each radiator features high-efficiency, multi-louvered fin cores with increased coolant volume, delivering significantly improved heat rejection compared to OE units. The cores are constructed by hand, with US born aluminum and an optimized fin pitch to maximize airflow and cooling performance under extreme load. Designed as a true bolt-in upgrade, they feature Direct Fit™ OEM-style mounting and fully compatible hose and sensor connections.
Whether you're attacking corners at the track or pushing your Corvette to its limits on the open road, consistent cooling is essential for sustaining power and ensuring long-term reliability. This high-performance radiator package delivers the thermal management needed to keep temperatures in check under any driving condition.
REAL BENEFITS, REAL RESULTS
- Complete aluminum radiator assembly with no plastic end tanks or rubber gaskets
- Track-optimized performance proven in racing applications
- Two row radiator design with dual 1-inch-wide core tubes for maximum cooling
- Fabricated end tanks fully TIG-welded to the core with no gaskets or epoxy construction
- Factory-sized cooling hose inlet and outlet connections to use stock hoses
- Radiators are born from US raw material and assembled entirely in the U.S.A.
- Covered by DeWitts exclusive lifetime warranty
- Increased coolant capacity and core surface area without fitment issues
- Serpentine cooling fins deliver optimum airflow across core tubes for cooling
- Mates directly to OE electric cooling fan and shroud
- In-house controlled atmosphere furnace brazed
FITMENT
32-1139120L C8 LEFT FRONT RADIATOR
• Pro Series Direct Fit™, natural finish, dual 1-inch core
32-1139120R C8 RIGHT FRONT RADIATOR
• Pro Series Direct Fit™, natural finish, dual 1-inch core
32-1139121M C8 AUXILIARY REAR RADIATOR
• Pro Series Direct Fit™, natural finish, dual 1-inch core
• Base Stingray or Z51 retrofit for enhanced cooling
• Not available for convertibles
SPECIFICATIONS
| Primary/Front | Auxiliary/Rear | |||
|---|---|---|---|---|
| C8 Radiators | OEM | DeWitts® | OEM | DeWitts® |
| Style | Single Pass | Single Pass | Double Pass | Double Pass |
| Flow | Down Flow | Down Flow | Down Flow | Down Flow |
| Inlet Location | Top Left/Right* | Top Left/Right* | Top Left/Right* | Top Left/Right* |
| Outlet Location | Bottom Middle | Bottom Middle | Top Left/Right* | Top Left/Right* |
| Row Quantity | 1 | 2 | 1 | 2 |
| Tube Size | 1.38 | 1.00 | 1.38 | 1.00 |
| Core Width | 17.33 | 16.96 | 10.28 | 10.53 |
| Core Height | 13.14 | 13.00 | 14.75 | 14.88 |
| Overall Width | 18.48 | 18.06 | 11.42 | 10.73 |
| Core Thickness | 1.38 | 2.25 | 1.38 | 2.25 |
| Overall Thickness | 2.36 | 2.75 | 2.36 | 2.75 |
| Overall Height | 17.18 | 17.42 | 17.35 | 17.62 |
| Cooler Fluid Capacity | 48 oz | 76 oz | 28 oz | 48 oz |
|
*Dependent on LH or RH unit or installation* - All measurements are in inches (“) |
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Specification Gains
Front Radiators: 32-1139120R and 32-1139120L
Base Models = 36% more surface cooling area on DeWitts Front Radiators
Z51, Z06, ZL1 = 14% more surface cooling area on DeWitts Front Radiators
Rear Radiators: 32-1139121M
DeWitts compared to the stock Auxiliary cooler is a 22% surface area gain
APPLICATION GUIDE
Fronts: All 2020 – Present models
Rears: 2020 – Present Z51, Z06, ZR1 (NO E-Ray, ZR1X, No convertibles)
WHY ADD AN AUXILIARY RADIATOR
1. Prevent Heat Soak During Track Use
The C8, especially in spirited or track driving, can experience high under hood and engine bay temperatures. An auxiliary radiator helps dissipate that excess heat before it causes performance loss or potential damage.
2. Increase Cooling Capacity Without Full System Overhaul
Adding a left rear (driver-side) auxiliary radiator boosts cooling efficiency
3. Support Engine Modifications or Power Adders
If you’ve added power (e.g., turbo, supercharger, or tune), the factory cooling system may no longer be sufficient. An auxiliary radiator provides extra thermal margin to support increased output.
4. Improve Longevity and Reliability
Heat is the enemy of reliability. Extra cooling helps protect critical systems like the transmission, engine, and cooling circuits from heat-related stress and premature wear.
5. OEM Integration with Aftermarket Performance
DeWitts offers this auxiliary radiator with OEM-style fitment, meaning you get the performance benefits with a factory-like install.
California Proposition 65 Statement
