CSF High-Performance Radiator – BMW 335i / 435i / M235i (F-Chassis, N55)

OVERVIEW

CSF's high-performance all-aluminum radiator for the N55-powered F-Chassis BMW replaces the factory plastic-tank unit with a fully welded aluminum assembly built around a 2-row 42mm dual core and CSF's exclusive B-Tube technology. An ultra-efficient 6.5mm multi-louvered fin maximizes surface area contact, so more heat leaves the coolant on every pass through the core.

CNC-machined quick-connect inlet and outlet connections, CNC-machined brackets and fittings and an all-aluminum race-style drain plug give it OEM-grade fit with motorsport-grade durability. It is a drop-in replacement that accepts all attaching OEM components including the quick-connect hoses, AC condenser, mounting brackets and fan shroud.

Two part numbers cover this platform and they are not interchangeable: CSF #7080 is the manual-transmission radiator and CSF #7081 is the automatic-transmission radiator. Choose the variant that matches your car's transmission.

SPECS

• 2-row 42mm dual core featuring CSF's exclusive B-Tube technology
• Ultra-efficient fin with 6.5mm fin height and multi-louvered design for maximum surface area contact
• CNC-machined quick-connect inlet and outlet connections
• CNC-machined brackets and fittings
• All-aluminum race-style drain plug
• Smooth satin finish
• Drop-in fit requiring no modifications; accepts OEM quick-connect hoses, AC condenser, mounting brackets and fan shroud
• Manual-transmission variant (CSF #7080) replaces OEM part number 17118678027 (supersedes 17118672107 and 17117600520)
• Automatic-transmission variant (CSF #7081) replaces OEM part number 17118672104 (supersedes 17117618807)
• CSF 2-year warranty, under normal use and service, to the original purchaser of the vehicle in which the product was originally installed

PARTS INCLUDED

• One (1) CSF all-aluminum radiator in the selected transmission variant, with CNC-machined brackets, fittings and drain plug
• Complete kit as supplied by CSF Radiators; CSF does not publish a bill of materials for this part — see the instructions packed in the box for the full contents.

TECH RESOURCES

Additional Parts Required

• None. CSF Radiators specifies no additional hardware for this part — it is a direct-fit replacement that reuses the OEM hoses, brackets, condenser and fan shroud.
• Installer-supplied: fresh BMW-spec coolant and distilled water to refill the system, plus a drain pan.

Installation

• CSF does not publish a downloadable installation PDF for this radiator. Printed installation instructions are packed in the box.
• Installation follows the factory radiator replacement procedure — drain, disconnect the quick-connect hoses, transfer the fan shroud and condenser, mount the CSF unit on the OEM points, refill and bleed.
• Bleed the cooling system completely after filling before the car is driven.
• Need help before or during the install? Contact Speed Logic and we will walk you through it.

Notes

• Order the correct variant for your transmission: CSF #7080 for manual-transmission cars, CSF #7081 for automatic-transmission cars. The 435i Gran Coupe (F36) is listed by CSF for the automatic radiator (#7081) only.
• M Sport F3X 335i and 435i: CSF lists the CSF #7078 High-Performance Radiator for M Sport trim. Confirm your trim with Speed Logic before ordering.
• This listing shows the N55 applications. CSF also lists #7080/#7081 for the 2.0L four-cylinder 228i, 320i, 328i and 428i and (#7080) the i3 range extender — contact Speed Logic to confirm those fitments.

PART NUMBER

• CSF #7080 — manual transmission
• CSF #7081 — automatic transmission

VEHICLE APPLICATIONS