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This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
06-14-2026
Maximize performance and reduce intake air temperatures on your E90 335d with the Turner Motorsport Stepped Intercooler. Designed as a direct-fit upgrade for the factory intercooler, this high-efficiency unit increases charge air volume and airflow, helping your diesel-powered BMW run cooler, stronger, and more efficiently.
Cooler air is denser air, and denser air means more power. By reducing intake air temperatures (IATs), this upgraded intercooler allows your M57 engine to pack in more air and fuel per cycle, translating to improved performance across the RPM range.
Engineered for performance and durability, the Turner stepped intercooler features cast aluminum end tanks and a bar-and-plate core design, offering superior thermal efficiency and structural strength. Compared to the stock unit, it delivers a 65% increase in both frontal surface area and internal cross-sectional flow, ensuring better heat dissipation and reduced pressure drop. All of this performance comes in a lightweight package under 20 lbs.
Finished in a stealthy black coating with laser-etched Turner logos, this intercooler not only performs but looks good doing it.
Key Features:
Designed specifically for the E90 335d (M57 engine)
Cast aluminum construction for durability
High-efficiency bar-and-plate core
65% increase in frontal and cross-sectional area
Significantly lowers IATs for improved power and reliability
Reduced pressure drop for more consistent boost delivery
Lightweight design – under 20 lbs
Dimensions: 520mm wide × 200mm tall × 150mm deep
Direct bolt-on installation – no modifications required
If you're looking to get the most out of your E90 335d, the Turner Motorsport Stepped Intercooler is a must-have upgrade for your turbo diesel intake system.
This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
06-14-2026
BMWs turbocharged S55 engine uses a water-to-air charge air cooling system, with a front-mounted heat exchanger responsible for heat dissipation. Unfortunately, the factory single-row, 27mm 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.
To solve this issue, we've developed a drop-in upgrade over the factory unit. Engineered 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 5052 aluminum, our design eliminates the factory plastic end tanks one of the systems 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.
By replacing the OEM 27mm single-row core with a robust 35mm dual-row design, this heat exchanger dramatically increases both cooling capacity and surface area. Frontal area jumps from 307mm to 475mm, resulting in a 100% increase in coolant volume and significantly improved heat-soak resistance. The outcome? Lower, more stable charge air temperatures that help your S55 deliver consistent, reliable power on the street or at the track.
Replaces OEM part numbers 17112284608 and 17112459062.
Features:
5052 aluminum construction eliminates plastic end tank failures A performance-oriented, dual-row core provides a 55% increase in frontal surface area, and a 100.29% increase in coolant volume over the OE heat exchanger! OE Heat Exchanger: Single-row core 27mm core thickness 307mm core height ECS High Performance Aluminum Heat Exchanger: Dual-row core 35mm core thickness 475mm core height TIG-welded 5052 aluminum end tanks, polished to a mirror finish for a high-quality look CNC-machined connectors and bracketry ensure seamless fitment with factory cooling hoses, transmission cooler lines, condenser, and radiator Drop-in upgrade - no modifications required for installation! Product Development:
Our High Performance Aluminum Heat Exchanger was designed, engineered, tested, and quality inspected by our Research and Development team in our Wadsworth, Ohio, facility. We strive for the highest level of precision and quality through leading-edge product development technology, including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.
This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
06-14-2026
Engines make more power when you're able to move as much air and fuel as possible through them. However, air density is just as important as air volume. Cooler air is denser air, so in addition to keeping your engine cool, it's important to make sure that your intake charge is as cool as possible. Turner Motorsport's upgraded intercooler works to reduce air temperatures with a bare minimum of pressure drop. Less pressure drop means less restriction, and a turbocharger that doesn't have to work as hard. This results not only in a longer service life for your turbocharger, but a substantial increase in performance as well.
The stepped design increases volume and surface are in a limited space by adding an additional smaller core at the top of the intercooler. Both cross sectional area and frontal surface area are increased by a whopping 56%, with a design that still weighs under 20 pounds. On the stock intercooler, the temperature differential between the inlet and outlet sides of the intercooler represented a 95 degree drop. With the Turner Motorsport intercooler, that drop was increased to a chilling 140 degrees. The dyno results don't lie: as a bolt-in upgrade, expect gains of 18 wheel horsepower and 10 lb/ft of torque. With a tune and supporting modifications, further gains are possible, up to 36 horsepower and 28 lb/ft of torque.
This cast aluminum intercooler features an attractive, easy to clean matte black finish, with etched Turner logos on the front and bottom. If you're looking for the ultimate cooling system upgrade for your turbo BMW, look no further.
Upgrade to the following OE Intercoolers: 17517600531, 17517600530, 17517618809
Fits the Following BMWs:
F22 F23 228i 228i M235i M235ix
F30 F31 F32 F33 F34 F36 328i 328ix 335i 335ix 428i 428ix 435i 435ix
This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
06-14-2026
Unlock the full potential of your turbocharged N54 or N55 engine with the Turner Motorsport Stepped Intercooler. Whether you're running higher boost, track days, or just spirited street driving, this direct-fit upgrade is engineered to dramatically reduce intake air temperatures (IATs) and improve charge air flow for consistent, reliable performance.
Cooler air is denser air, and that means more oxygen per cycle for better combustion and more power. The factory intercooler quickly becomes a bottleneck under increased load or in warm conditions. Turner’s stepped intercooler solves that by offering an 80% increase in frontal surface area and cross-sectional flow, helping your BMW stay cooler and pull harder.
Constructed with high-quality cast aluminum end tanks and a bar-and-plate core, this intercooler delivers superior cooling efficiency and reduced pressure drop, even under sustained high-boost operation. The black powder-coated finish offers a clean, stealthy appearance, while the etched Turner logos add just the right touch of motorsport style.
Perfect for:
E82/E88 135i, E9X 335i/335xi, E84 X135i, E89 Z4 35i/35is
Key Features:
Direct-fit upgrade for E chassis N54 & N55 engines
Durable cast aluminum end tanks
High-efficiency bar-and-plate design
80% increase in frontal and cross-sectional area vs. stock
90% increase in charge air volume
Substantially lower IATs for improved power and reliability
Reduced and more consistent pressure drop
Lightweight design (under 20 lbs)
Dimensions: 520mm wide × 210mm tall × 130mm deep
Stealth black finish with Turner-etched logos
If you're looking to push your turbo BMW harder, the Turner Motorsport Stepped Intercooler is the cooling solution that keeps your engine running strong—pull after pull.
This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
06-14-2026
Looking to upgrade your intercooler? This Phoenix Racing intercooler designed by Burger Motorsport is a great option that delivers better cooling, more power to the wheels, and allows you to hold that power longer during extended runs. A larger core and increased surface area dramatically improves cooling and reduces pressure drop. After extensive testing, this can allow your N54/55 powered BMW to gain around 10+peak wheel horsepower and during longer pulls and multiple runs, as much as 20-30whp over the factory intercooler.
Phoenix replacement intercoolers are a direct replacement for your factory intercooler and fully reversible. All required hardware is included.
Dimensions: 20" x 5.25" x 5.25"
This product was last offered at the strikethrough price on
05-03-2026
This product was last offered at the strikethrough price on
05-03-2026
