Our Mosselman Oil Thermostat is the core of this system. Instead of opening at the factory 105°C, it opens at 85°C, lowering operating oil temperature by roughly 20°C without slowing down warm-up time. This makes it suitable for both cold and warm climates, and especially effective on tuned engines. Built from CNC-machined billet aluminium and equipped with a real thermostat, it installs easily and is available in aluminium, black, red or blue. It is a simple but highly effective upgrade that improves stability, reliability and everyday drivability. For E-series N54 and N55 models that need even more cooling capacity, we offer the Mosselman Oil Cooler Kits. These kits use a high-quality Setrab 19-row cooler, pre-assembled brackets and a complete hose and adapter set in anodized grey or red. They are available as single or modular extension kits, allowing you to add a second cooler on the opposite side of the car for maximum heat control during track use or hot-climate driving. Installation is straightforward, although not fully plug-and-play, and takes around three hours. All Mosselman cooling products share the same philosophy: bring temperatures down earlier, keep them stable and protect the engine from unnecessary stress. Lower heat means longer-lasting turbos, healthier oil and more consistent performance, whether on a summer highway run or during spirited driving. It is performance you can feel, and reliability you can trust. BMW engines like the N54, N55 and S55 are well known for running hot, which is why we developed a complete range of cooling upgrades designed to keep temperatures under control in every condition. When an engine runs at the right temperature, power stays consistent, the oil remains healthy longer and the whole car feels calmer, even under heavy load. 18 50 YEARS OF BOOSTING PERFORMANCE OIL COOLER THERMOSTATS & KITS
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