ECS High Performance Aluminum Heat Exchanger - G2X B48 & B58
BMW’s turbocharged B48 and B58 engines use a water-to-air charge air cooling system, with a front-mounted heat exchanger responsible for heat dissipation. Unfortunately, the factory single-row, 25mm core design is quick to heat soak under high load, leading to excessive intake air temperatures and potential limp mode conditions—especially on modified or track-driven cars.
ECS Tuning’s High Performance Aluminum Heat Exchanger was developed in-house as a direct replacement and upgrade over the factory unit. Designed for durability and maximum cooling efficiency, this heat exchanger is a must-have for high-horsepower street builds, spirited canyon driving, and extended track sessions. Built from TIG-welded 6061-T6 aluminum, the ECS unit eliminates the factory plastic end tanks—one of the system’s most common failure points. Each heat exchanger features CNC-machined billet aluminum hose connections, mounting flanges, and brackets for perfect OE fitment and trouble-free installation.
To drastically improve thermal efficiency, the factory 25mm single-row core has been replaced with a dual-row, 42mm performance core, offering a 72% increase in thickness. This expanded design nearly doubles coolant volume, allowing for greater heat dissipation, reduced intake air temperatures, and more consistent power delivery.
Replaces OEM Part Numbers: 17118666811, 17115A54040
Features:
6061 aluminum construction eliminates plastic end tank failure Dual-row, 42mm performance core provides 72% greater core thickness for improved cooling efficiency OE core: single-row, 25mm | ECS core: dual-row, 42mm TIG-welded 6061-T6 aluminum end tanks for exceptional strength Polished end tanks deliver a clean, high-quality finish CNC-machined billet connectors and brackets ensure seamless OE-style fitment Direct bolt-on upgrade – no modifications required
Earn 5% back in Turner Rewards on orders placed 10/28-10/31. Redeem 11/27-12/1. Terms & conditions apply
Earn 5% back in Turner Rewards on orders placed 10/28-10/31. Redeem 11/27-12/1. Terms & conditions apply
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This product was last offered at the strikethrough price on
05-03-2026
Lifetime Replacement Program! Read more here
Product Details
BMW’s turbocharged B48 and B58 engines use a water-to-air charge air cooling system, with a front-mounted heat exchanger responsible for heat dissipation. Unfortunately, the factory single-row, 25mm core design is quick to heat soak under high load, leading to excessive intake air temperatures and potential limp mode conditions—especially on modified or track-driven cars.
ECS Tuning’s High Performance Aluminum Heat Exchanger was developed in-house as a direct replacement and upgrade over the factory unit. Designed for durability and maximum cooling efficiency, this heat exchanger is a must-have for high-horsepower street builds, spirited canyon driving, and extended track sessions. Built from TIG-welded 6061-T6 aluminum, the ECS unit eliminates the factory plastic end tanks—one of the system’s most common failure points. Each heat exchanger features CNC-machined billet aluminum hose connections, mounting flanges, and brackets for perfect OE fitment and trouble-free installation.
To drastically improve thermal efficiency, the factory 25mm single-row core has been replaced with a dual-row, 42mm performance core, offering a 72% increase in thickness. This expanded design nearly doubles coolant volume, allowing for greater heat dissipation, reduced intake air temperatures, and more consistent power delivery.
Replaces OEM Part Numbers: 17118666811, 17115A54040
Features:
- 6061 aluminum construction eliminates plastic end tank failure
- Dual-row, 42mm performance core provides 72% greater core thickness for improved cooling efficiency
- OE core: single-row, 25mm | ECS core: dual-row, 42mm
- TIG-welded 6061-T6 aluminum end tanks for exceptional strength
- Polished end tanks deliver a clean, high-quality finish
- CNC-machined billet connectors and brackets ensure seamless OE-style fitment
- Direct bolt-on upgrade – no modifications required
Prop 65 Warning
- 17118666811
- 17115A54040
