CSF High-Performance All-Aluminum Radiator for BMW E82 1M, E8X 135i, E9X 335i, and E89 Z4

When it comes to keeping your BMW cool on the street or at the track, the CSF 7046 High-Performance All-Aluminum Radiator is engineered specifically for your 1M, 135i, 335i, or Z4. With over 50 years of experience in radiator manufacturing, CSF delivers a product that meets the demands of both high horsepower builds and race vehicles that require superior cooling performance.

Innovative B-Tube Technology

This radiator features a 2-row, 42mm core utilizing CSF's exclusive B-Tube Technology. Unlike traditional oval "O" type tubes, the B-tube design increases heat transfer surface area by approximately 15%, allowing for dual liquid laminar flow. This means enhanced cooling efficiency in a lighter, stronger package. The specially engineered tubes are brazed at the seams, ensuring durability and performance under pressure.

Precision Engineering for Maximum Performance

CSF's ultra-efficient multi-louvered fins are meticulously aligned to optimize airflow through the radiator core. Each fin is engineered for maximum heat rejection, ensuring your engine stays cool even under the most demanding conditions. The result? A reliable radiator that performs when it matters most.

Installation Made Easy

The CSF 7046 radiator is designed as a true drop-in fit for your vehicle, meaning no modifications are necessary during installation. It features CNC machined brackets and fittings that ensure superb durability, and the inlet/outlet connections are designed to match your OEM setup, allowing you to reuse your factory hoses or aftermarket options.

Technical Specifications

• Core Height: 23.625 in.
• Core Width: 13.625 in.
• Core Thickness: 1.625 in.
• Core Material: Aluminum
• Core Row Quantity: 2
• Inlet Diameter: 1.5 in. (Top Right)
• Outlet Diameter: 1.5 in. (Bottom Left)
• Cross Flow Design
• Finish: Smooth Satin
• Mounting Type: Uses OE Hardware
• Internal Transmission Oil Cooler: Yes

Fitment

This radiator is compatible with the following BMW models:

• BMW 135i (2008-2013)
• BMW 335i (2007-2013)
• BMW 335is (2011-2013)
• BMW 335xi (2007-2008)
• BMW X1 (2013-2015)
• BMW Z4 (2009-2016)

Customer Feedback

BMW 335i owner shared: “I installed the CSF radiator last summer, and it’s been a game changer. The temps stay low even during spirited driving sessions. It fits perfectly with no modifications, and I can feel the difference in performance.”

Choose CSF for the best in performance and reliability. Upgrade your BMW's cooling system with the CSF 7046 radiator and experience the difference in both daily driving and track days.