WARMING THE ENGINE…
Front HX · low-temp circuit
The other half of the S55's water-to-air system: the front-mounted heat exchanger that rejects the charge heat to ambient. A larger, denser core here is what keeps the low-temperature circuit — and therefore the manifold charge cooler — from heat-soaking in sessions. Pair with the top-mount cooler and a healthy pump.
| Platform | S55 |
|---|---|
| Years | 2014–2020 |
| Models | F80 M3 · F82/F83 M4 · M2 Competition |
| Notes | Larger front heat exchanger for the S55's low-temperature coolant circuit. |
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