Description
Keep your Mercedes-Benz C63 / C63 S AMG W205 running cooler and performing consistently with the Untd. Performance Radiator, designed to improve cooling efficiency and provide increased thermal capacity for both street and high-performance applications.
The factory cooling system can become increasingly challenged under repeated hard driving, higher ambient temperatures, increased boost, and modified engine setups. The Untd. Performance Radiator is engineered as a performance-focused cooling upgrade to help maintain more consistent coolant temperatures and reduce the risk of heat-related performance loss.
Whether you’re upgrading your C63 for spirited street driving, track use, or a higher-power build, this radiator provides additional cooling capability to help support reliable performance.
Key Features
- Upgraded Cooling Capacity – Designed to provide improved heat dissipation compared to the factory radiator.
- Improved Thermal Management – Helps maintain more consistent coolant temperatures during aggressive driving and repeated pulls.
- Performance-Oriented Design – Ideal for modified and higher-output C63 AMG applications.
- Reduced Heat Soak – Increased cooling capacity helps combat rising coolant temperatures during demanding driving conditions.
- Durable Construction – Built for the demands of high-performance street and track applications.
- Direct-Fit Design – Designed specifically for the Mercedes-Benz C63 / C63 S AMG W205 platform.
- Installation Hardware Included – Includes required installation hardware where applicable.
- Tune-Friendly Upgrade – Compatible with stock and tuned vehicles without requiring ECU calibration.
Estimated Performance Gain
A radiator upgrade is primarily a thermal-management modification, rather than a direct horsepower-producing component. The main benefit is maintaining more consistent engine temperatures, particularly when the vehicle is driven aggressively or operated at higher power levels.
| Vehicle Setup | Estimated HP Gain | Estimated Torque Gain |
|---|---|---|
| Stock Vehicle | ~0–3 HP | ~0–3 WTQ |
| Stage 1 Tune | ~0–5 HP* | ~0–5 WTQ* |
| Stage 2 / Performance Setup | ~0–5 HP* | ~0–5 WTQ* |
*The radiator itself does not directly add significant horsepower or torque. Any measurable improvement is primarily the result of improved temperature control and reduced heat-related power loss under sustained driving conditions.
Important: Actual results will vary depending on ambient temperature, vehicle configuration, tune, cooling system condition, driving conditions, and supporting modifications.

