Radiator water / coolant - Centre. Porsche 992 Carrera / 992 Turbo  ❭  992121253C

Radiator water / coolant, additional, middle. Included protective grille.
The Porsche Genuine OE Additional Water Coolant Radiator (Part No. 992121253C / 992-121-253-C) is an original-equipment auxiliary coolant heat exchanger engineered to Porsche’s exact factory standards. Often referred to as the center additional radiator or middle water cooler, this part is designed to supplement the primary cooling system in Porsche 911 (992) models with high-output engines and thermal demands.

Fits:
for vehicles with additional coolant radiator
Porsche 992.1 Carrera 2019 - 2024
Porsche 992.2 Carrera 2024 >>
Porsche 992 Turbo 2020 >> (PR:8Z6, 8Z8)

Diagram ref no 1

This additional radiator provides extra heat dissipation capacity within the cooling system by increasing the surface area over which the engine’s coolant heat is released. Positioned centrally within the cooling network, it helps:
• Reduce engine coolant temperatures under high-load conditions
•  Improve thermal stability during spirited driving, hot ambient temperatures, or track use
•  Support consistent performance and emissions control by maintaining optimal coolant temperatures
•  Relieve load on the main radiator by providing an auxiliary heat rejection path

By aiding in heat extraction before the coolant returns to the engine, it enhances the overall effectiveness of the cooling system - key for modern turbocharged powertrains.

The Porsche Genuine OE Additional Water Coolant Radiator 992121253C is a supplemental cooling component engineered for Porsche 911 (992) models that require enhanced heat rejection capacity. By increasing the coolant’s ability to shed heat before returning to the engine, this auxiliary radiator helps maintain consistent thermal control - essential for high-output engines, variable load conditions, and high ambient temperatures. Its genuine Porsche engineering ensures a precise fit and reliable performance aligned with factory thermal management design.

Modern performance engines generate significant heat, especially in turbocharged applications or during spirited driving. The primary radiator alone may not maintain ideal operating temperatures under all conditions - and excessive heat can reduce engine efficiency, raise emissions, and accelerate wear. An additional OE Porsche radiator like 992121253C increases cooling capacity, helping maintain lower coolant temperatures and improve overall engine longevity and performance consistency.

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992121253C

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