Designed to perform on the street or at the track, a performance radiator is a must-have for both high horsepower builds as well as race vehicles which need added cooling performance in motorsports environments.
This radiator features a 2-Row core with CSF's exclusive B-Tube Technology: Unlike a regular oval shape "O" type radiator tube, CSF uses a specially engineered tube in the shape of a "B". These "B-tubes" are carefully formed and then brazed over the seam to seal. CSF is able to use thinner and lighter aluminum material (with better cooling efficiency) because this design is actually stronger than normal "O" shape tubes that are welded. The design (inlet in the middle of the tube that is seam brazed) increases the heat transfer surface area of the tubes by approximately 15% over regular tubes - producing the efficiency of two smaller tubes vs. one large tube within the same space criteria. With "B-tubes" you are able to get "dual liquid laminar flow". CSF also uses ultra efficient multi louvered fins that are carefully and precisely aligned to maximize airflow through each radiator core. Fin specifications are carefully measured and calculated for each application, and tested for maximum heat rejection efficiency in our wind-tunnel lab.
The CSF auxiliaryradiator is a true "Drop-in fit" design requiring no modifications to install. OE style brackets are all CNC machined and welded for the best durability possible. Inlet/Outlet connections are designed to match the OE connections so you can reuse OEM hoses or aftermarket.
Full product details can be found here (link will open in a new window)
Fits these vehicles
2015-2020 Audi 8VA3 Quattro-Turbocharged 2L L4
2015-2020 Audi 8VS3-Turbocharged 2L L4
2022-2025 Audi 8YS3-Turbocharged 2L L4
2016-2022 Audi Mk3 TT Quattro-Turbocharged 2L L4
2016-2022 Audi Mk3 TTS Quattro-Turbocharged 2L L4
2013-2017 Volkswagen-Beetle R-Line Turbocharged 2L L4-2015
2019 Volkswagen Mk7 Golf R-Turbocharged 2L L4
2022-2025 Volkswagen MK8 Golf R-Turbocharged 2L L4
2013-2018 Volkswagen Mk7 Jetta GLI Turbocharged 2L L4
OE Part number cross reference:
Audi: 5Q0 121 251 HA
Audi: 5Q0-121-251-HA
Audi: 5Q0121251HA
Audi: 5Q0 121 253 H
Audi: 5Q0-121-253-H
Audi: 5Q0121253H
Volkswagen: 5Q0 121 251 HA
Volkswagen: 5Q0-121-251-HA
Volkswagen: 5Q0121251HA
Volkswagen: 5Q0 121 253 H
Volkswagen: 5Q0-121-253-H
Volkswagen: 5Q0121253H
Designed to perform on the street or at the track, a performance radiator is a must-have for both high horsepower builds as well as race vehicles which need added cooling performance in motorsports environments.
This radiator features a 2-Row core with CSF's exclusive B-Tube Technology: Unlike a regular oval shape "O" type radiator tube, CSF uses a specially engineered tube in the shape of a "B". These "B-tubes" are carefully formed and then brazed over the seam to seal. CSF is able to use thinner and lighter aluminum material (with better cooling efficiency) because this design is actually stronger than normal "O" shape tubes that are welded. The design (inlet in the middle of the tube that is seam brazed) increases the heat transfer surface area of the tubes by approximately 15% over regular tubes - producing the efficiency of two smaller tubes vs. one large tube within the same space criteria. With "B-tubes" you are able to get "dual liquid laminar flow". CSF also uses ultra efficient multi louvered fins that are carefully and precisely aligned to maximize airflow through each radiator core. Fin specifications are carefully measured and calculated for each application, and tested for maximum heat rejection efficiency in our wind-tunnel lab.
The CSF auxiliaryradiator is a true "Drop-in fit" design requiring no modifications to install. OE style brackets are all CNC machined and welded for the best durability possible. Inlet/Outlet connections are designed to match the OE connections so you can reuse OEM hoses or aftermarket.
Full product details can be found here (link will open in a new window)
Fits these vehicles
2015-2020 Audi 8VA3 Quattro-Turbocharged 2L L4
2015-2020 Audi 8VS3-Turbocharged 2L L4
2022-2025 Audi 8YS3-Turbocharged 2L L4
2016-2022 Audi Mk3 TT Quattro-Turbocharged 2L L4
2016-2022 Audi Mk3 TTS Quattro-Turbocharged 2L L4
2013-2017 Volkswagen-Beetle R-Line Turbocharged 2L L4-2015
2019 Volkswagen Mk7 Golf R-Turbocharged 2L L4
2022-2025 Volkswagen MK8 Golf R-Turbocharged 2L L4
2013-2018 Volkswagen Mk7 Jetta GLI Turbocharged 2L L4
OE Part number cross reference:
Audi: 5Q0 121 251 HA
Audi: 5Q0-121-251-HA
Audi: 5Q0121251HA
Audi: 5Q0 121 253 H
Audi: 5Q0-121-253-H
Audi: 5Q0121253H
Volkswagen: 5Q0 121 251 HA
Volkswagen: 5Q0-121-251-HA
Volkswagen: 5Q0121251HA
Volkswagen: 5Q0 121 253 H
Volkswagen: 5Q0-121-253-H
Volkswagen: 5Q0121253H
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