CSF High-Performance All-Aluminum Radiator for BMW 1 Series M, 135i, 335i, and Z4 – Part #7046

Description

Designed by CSF with over 50 years of expertise in radiator manufacturing, this high-performance all-aluminum radiator is the optimal cooling solution for BMW models including the 1M, 135i, 335i, and Z4. Engineered for both street driving and track use, it provides exceptional heat dissipation to keep your engine running at peak efficiency. Featuring a 2-Row core with CSF’s exclusive B-Tube Technology, this radiator offers increased heat transfer surface area and enhanced strength compared to traditional designs. The B-tube design employs a specially formed and brazed “B” shape tube, which allows for thinner, lighter aluminum construction while maintaining durability and improving cooling performance. This innovative tube shape facilitates dual liquid laminar flow, significantly boosting heat rejection capabilities and overall cooling efficiency. The radiator also incorporates multi-louvered fins, precisely aligned to maximize airflow and enhance heat dissipation, tested rigorously in CSF’s wind tunnel laboratory to ensure maximum performance.
The CSF #7046 radiator is a direct-fit replacement that installs seamlessly into the OEM location without modification, accepting all factory components including quick-connect hoses, the AC condenser, mounting brackets, and fan shroud. With a smooth satin finish, CNC-machined brackets, and fittings, this radiator combines durability with a sleek appearance. The core features a high-efficiency 6.5mm fin height and multi-louvered design for maximum contact surface area, enabling superior cooling even under high-performance conditions. An all-aluminum race-style drain plug adds to its race-ready design, making it suitable for demanding motorsports environments. Whether for everyday use or high-horsepower builds, this radiator ensures your engine remains cool and performs reliably.
Installation is straightforward for qualified technicians, but CSF recommends professional installation if you’re unsure of the procedure. This radiator is compatible with various BMW models from 2007 to 2013, including the 2011+ BMW 1 Series M, 2008-2011 BMW 335i, and 2009+ BMW Z4 sDrive30i and sDrive35i (automatic transmission only). Built with industry-leading technology, this radiator is a reliable upgrade for enthusiasts seeking improved cooling efficiency and durability in their BMW vehicle.

Features:

• Drop-in fit design requiring no modifications for easy installation

• Accepts all OEM components including quick-connect hoses, AC condenser, and mounting brackets

• Core features ultra-efficient 6.5mm fin height with multi-louvered design for maximum surface contact

• Two-row 42mm dual core with CSF’s exclusive B-Tube technology for enhanced heat transfer

• CNC-machined brackets and fittings for precise fit and long-lasting durability

• All-aluminum construction with race-style drain plug for reliability

• Smooth satin finish for a sleek appearance

Fitment:
BMW 1 Series M Base 2011
BMW 135i Base 2008
BMW 135i Base 2009
BMW 135i Base 2010
BMW 135i Base 2011
BMW 135i Base 2012
BMW 135i Base 2013
BMW 135is Base 2013
BMW 335i Base 2007
BMW 335i Base 2008
BMW 335i Base 2009
BMW 335i Base 2010
BMW 335i Base 2011
BMW 335i Base 2012
BMW 335i Base 2013
BMW X1 sDrive28i 2013
BMW X1 sDrive28i 2014
BMW X1 sDrive28i 2015
BMW X1 xDrive28i 2013
BMW X1 xDrive28i 2014
BMW X1 xDrive28i 2015
BMW Z4 sDrive28i 2012
BMW Z4 sDrive28i 2013
BMW Z4 sDrive28i 2014
BMW Z4 sDrive28i 2015
BMW Z4 sDrive28i 2016
BMW Z4 sDrive30i 2009
BMW Z4 sDrive30i 2010
BMW Z4 sDrive30i 2011
BMW Z4 sDrive35i 2009
BMW Z4 sDrive35i 2010
BMW Z4 sDrive35i 2011
BMW Z4 sDrive35i 2012
BMW Z4 sDrive35i 2013
BMW Z4 sDrive35i 2014
BMW Z4 sDrive35i 2015
BMW Z4 sDrive35i 2016
BMW Z4 sDrive35is 2011
BMW Z4 sDrive35is 2012
BMW Z4 sDrive35is 2013
BMW Z4 sDrive35is 2014
BMW Z4 sDrive35is 2015
BMW Z4 sDrive35is 2016