Even in stock trim, the oil on the E46 M3 gets hot. Add additional horsepower and stress on the engine, run it around the track for 10 minutes straight, and the oil gets very hot. Even the best synthetics should be kept under 250 degrees if possible and never above 300 degrees, and on this car, the stock cooler just will not get the job done.
CSF's newly designed high performance race-spec oil cooler will keep oil temperatures stable, even in the most demanding endurance racing conditions and extreme ambient temperatures. CSF's new E46 M3 oil cooler has been lab tested in an ISO certified state-of-the-art cooling system testing facility including wind tunnel, vibration, thermal cycle, burst pressure, and salt spay corrosion testing for maximum performance and reliability. Because of CSF's global economies of scale, the CSF Racing & High Performance Division has been able to deliver a premium oil cooling solution with a level of quality, performance, and craftsmanship that is usually found in products with a much higher price point.
Construction and Core- CSF has manufactured the world's most durable and robust E46 M3 oil cooler by using an innovate design that features extruded aluminum end tanks (rather than fabricated aluminum sheet metal) and a bar&plate oil cooling core. The core uses an ultra efficient multi-louvered high density fin configuration between high pressure oil cooling plates to achieve maximum heat transfer performance and oil cooling efficiency. With this type of construction you never have to worry about road debris damaging the core and causing a leak in the oil cooler.
Capacity - Twice the oil capacity as the OEM unit.
Two-Pass Design - CSF's new E46 M3 oil cooler features an efficient top/bottom dual-pass design which is comparable in performance to a counter-flow design (front/back) that is much more costly to manufacture and purchase.
Mounting - This production manufactured high performance oil cooler utilizes four mounting tabs and two bolts to secure directly and easily to your stock radiator's mounting points. No fabrication or additional brackets required. This is a complete drop-in fit solution which requires no modifications to install.
Plumbing - This is a direct-fit oil cooler for use with the OEM oil cooler lines & hoses (E46 M3 specific).
Size & Weight - Approximately 27"L x 3"H x 3"D, 9 lbs
All CSF high performance cooling systems come with a two year warranty against defects in craftsmanship or performance. Each CSF cooling system is individually pressure tested before packaging for maximum reliability.
*This product is designed to be a bolt-on retrofit, but works particularly well in conjunction with the CSF E46 M3 triple-pass Performance Radiator or OEM unit.