CSF's all-aluminum performance radiator is a direct drop-in for the E8X/E9X BMW 1- and 3-Series (128i, 325i, 328i, 330i) and E89 Z4, adding cooling capacity for high-horsepower street and track builds. It uses a 2-row 42mm core with CSF's B-tube technology, brazing a B-shaped tube to raise heat-transfer surface area roughly 15% over standard oval tubes for dual laminar flow. Multi-louvered fins with a 6.5mm fin height maximize airflow, and the radiator accepts all factory quick-connect hoses, AC condenser, brackets and fan shroud with no modifications. CNC-machined fittings, an all-aluminum race-style drain plug and a satin finish complete it.
| Type | All-aluminum performance radiator (CSF B-Tube) |
| Material | Aluminum |
| Core | 2-Row 42mm dual core (B-Tube technology) |
| Fins | Multi-louvered, 6.5mm fin height |
| Finish | Satin |
| Fit | Direct drop-in; accepts factory quick-connect hoses, AC condenser, brackets and fan shroud |
| Included | All-aluminum race-style drain plug |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2013 | BMW | 128i | Base |
| 2006 | BMW | 325i | Base |
| 2006 | BMW | 325xi | Base |
| 2007-2013 | BMW | 328i | Base |
| 2009-2013 | BMW | 328i xDrive | Base |
| 2007-2008 | BMW | 328xi | Base |
| 2006 | BMW | 330i | Base |
| 2006 | BMW | 330xi | Base |
| 2009-2010 | BMW | Z4 | sDrive30i |
