Dinan High Performance Heat Exchanger - BMW M240i/M340i/M440i (G20/G22/G26/G42)

On these cars the intercooler is water-to-air, and the low-temperature heat exchanger up front is what sheds that heat. Dinan's version uses a much thicker core with more cooling area, so it handles back-to-back pulls and hot days better. Less heat soak also means less chance of the car pulling timing or going into limp mode.

What you get

• 45 mm core, against 26.75 mm for the factory part, with about 68% more cooling surface.
• TIG-welded aluminum, pressure tested before it ships.
• Direct-fit replacement for the factory low-temperature heat exchanger.
• Measured results: in Dinan's testing over 30 straight full-throttle pulls, charge air ran 8.7°C cooler on average and about 12°C cooler at most.

Good to know

• The install is involved. It means draining the coolant and taking off the strut braces, skid plate and fan assembly. Dinan quotes 3.7 hours of labor.

Brand: Dinan · Part #: D780-0003

Ships from the brand or distributor, usually in 3-7 business days.

• Ships from the brand or distributor, usually in 3–7 business days.
• Shipping is charged at the carrier's rate, shown at checkout. Orders over 70 lb ship by freight for a flat $99.
• Unused parts can be returned within 30 days. Some items are marked no-refund in their description.

Full details are on our shipping and returns page.