G-PLUS 25-Row Aluminum Oil Cooler Kit — E90/E92/E93 335i N54

AN-10 inlet and outlet sizing keeps this kit compatible with a wide range of aftermarket hose and fitting setups, making it easy to integrate into existing builds or run as a standalone upgrade. Beyond engine oil, the cooler is equally capable of handling transmission and rear differential cooling duties — a versatile one-unit solution for managing heat across the entire drivetrain, whether you're chasing lap times or just protecting a heavily modded street car.

All-aluminum construction keeps the unit lightweight while providing the structural durability needed to withstand sustained heat cycles and underhood conditions. Reduced oil temperatures translate directly to better lubrication film stability, slower oil degradation, and less wear on bearings, cylinder walls, and turbocharger internals — all areas where an uncooled N54 starts to show stress under repeated hard use.

Installation is approachable for an experienced DIYer familiar with oil system work, but professional fitment is strongly recommended to ensure correct line routing, proper torque on AN fittings, and a fully leak-free system before returning the car to service. For any 335i owner serious about long-term engine health, this is one of the highest-value protective upgrades available at this price point.