CSF High-Performance all-aluminum radiator for the 2000-2002 Audi S4 (B5), covering Base and Avant. It runs a dual-core 2-row 42mm core with CSF's exclusive B-Tube technology, which raises tube heat-transfer surface area by about 15% over standard O-shape tubes for stronger cooling on the street or at the track. Ultra-efficient multi-louvered fins with a 6.5mm fin height maximize airflow through the core. The radiator is a drop-in fit and accepts all factory components, including the quick-connect hoses, AC condenser, mounting brackets, and fan shroud.
| Type | High-performance all-aluminum radiator (CSF B-Tube) |
| Core | 2-row 42mm dual core, B-Tube technology |
| Fins | Multi-louvered, 6.5mm fin height |
| Inlet / Outlet | CNC-machined quick-connect connections |
| Finish | Smooth satin |
| Fit | Drop-in; accepts OEM hoses, AC condenser, brackets, and fan shroud |
| Included | All-aluminum race-style drain plug |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2001-2002 | Audi | S4 | Avant |
| 2000-2002 | Audi | S4 | Base |
