CSF High-Performance Radiator – BMW Z4 / 330i (G-Chassis, B46/B58)

OVERVIEW

CSF is the largest and most popular manufacturer of BMW B58 cooling systems. With enthusiasts, tuners and race teams pushing these cars further than anyone anticipated, CSF completed the cooling suite with this High-Performance All-Aluminum Radiator for the BMW G-Series Z4 (G29) and G20 330i.

The radiator uses a 2-row, 42mm ultra-high-performance core with cooling tubes built on CSF's exclusive B-Tube technology, which increases heat transfer by roughly 15% over a conventional tube. The core carries new 5mm tall ultra-efficient multi-louvered fins for maximum surface area contact, and construction is 100% all-aluminum TIG-welded with CNC-machined mounting brackets and OEM-style inlet and outlet connections.

Every unit is individually leak and pressure tested and finished with a 1-hour hand-polished mirror finish. Installation is true plug-and-play in the factory location and requires absolutely no modifications.

SPECS

• 2-row, 42mm ultra-high-performance core
• Cooling tubes use CSF's exclusive B-Tube technology — approximately 15% increased heat transfer
• New 5mm tall ultra-efficient multi-louvered fins for maximum surface area contact
• 100% all-aluminum TIG-welded construction
• CNC-machined mounting brackets
• OEM-style inlet and outlet connections
• 1-hour "mirror finish" hand polish
• Individually leak and pressure tested
• True plug-and-play "drop-in fit" — requires absolutely no modifications
• OEM cross-reference: BMW 17118666739
• 2-year limited warranty

PARTS INCLUDED

• CSF #7226 high-performance all-aluminum radiator
• CNC-machined mounting brackets and OEM-style inlet/outlet connections

TECH RESOURCES

Additional Parts Required

• None. CSF specifies no additional hardware for this part — the radiator mounts in the factory location and accepts the OEM connections with no modification.
• Coolant for refilling and bleeding the cooling system after installation (installer supplied).

Installation

• CSF does not publish a downloadable installation PDF for this part. Printed installation instructions are supplied in the box.
• Installation requires absolutely no modification to the vehicle; the radiator reuses the OEM mounting points and inlet/outlet connections.

Notes

• CSF lists the G20 330i through the 2021 model year only, and does not list the 330e plug-in hybrid. Confirm fitment for your specific chassis with Speed Logic before ordering.
• Toyota GR Supra? See CSF Performance Radiator – Toyota GR Supra (A90/A91).

PART NUMBER

• 7226 — CSF A9X Supra & BMW G-Series High-Performance All-Aluminum Radiator

VEHICLE APPLICATIONS