CSF 7001 BMW E9X E8X E89 All-Aluminum High-Performance Radiator

The CSF 7001 is a high-performance, all-aluminum replacement radiator engineered specifically for BMW E9X (325i, 330i, 328i), E8X (128i), and E89 Z4 chassis. Built on the same production lines as OE components and backed by CSF's ISO-certified manufacturing, this radiator delivers significantly improved heat rejection over the stock unit — whether on the street or at the track.

Exclusive B-Tube Technology:

At the core of the CSF 7001 is a proprietary 2-Row, 42mm dual-core design featuring CSF's patented B-Tube construction. Rather than a standard oval "O" tube, CSF uses a specially engineered "B"-shaped tube that is seam-brazed rather than welded. This design is stronger, uses lighter-gauge military-grade aluminum, and increases the tubes' heat transfer surface area by approximately 15% over conventional tubes — delivering dual liquid laminar flow and the cooling efficiency of two smaller tubes in the same footprint.

Key Features:

• 2-Row 42mm dual-core with CSF's exclusive B-Tube technology
• Ultra-efficient multi-louvered fins with 6.5mm fin height, wind-tunnel tested for maximum heat rejection
• Military-grade (special clad) aluminum throughout — tubes, fins, header plates, and side brackets (JIS 3003 spec minimum)
• CNC-machined "Quick-Connect" inlet/outlet connections compatible with OEM and aftermarket hoses
• CNC-machined OE-style brackets and fittings for precise fit and long-term durability
• All-aluminum racing-style drain plug
• 1-hour hand-polished "Show-Stopper™" mirror finish
• True drop-in fitment — no modifications required; accepts OEM quick-connect hoses, AC condenser, mounting brackets, and fan shroud
• Fits both automatic and manual transmission models
• Brazed in a controlled atmosphere brazing (CAB) furnace — the preferred process for aluminum
• ISO 9001/9002 certified manufacturing

Every CSF radiator undergoes rigorous quality control including hydrostatic testing, vacuum decay testing, burst pressure testing, and life-cycle testing before leaving the factory. CSF's factories are ISO-certified and serve as OE suppliers to major US, German, and Asian manufacturers, ensuring the same production standards that go into original equipment.

Cross-reference part numbers: CSF-7001, CSF.7001, CSF7001