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Evolution Racewerks (ER) BMW N55 Oil Cooler Upgrade (M2, M135i, M235i, 335i & 435i) - ML Performance UK

Evolution Racewerks (ER) BMW N55 Oil Cooler Upgrade (M2, M135i, M235i, 335i & 435i)

Evolution Racewerks (ER)

  • £995.08
    exc. VAT £829.23


It's well known that the N55 engines runs very hot.  Turbos that build a lot of heat and a small radiator play into why this engine runs so hot.  A quick look at your gauge cluster on your dash after a few minutes of "spirited" driving, you'll notice oil temperatures over 250 degrees.  Considering that most cars don't even exceed 230 degrees tells you quite a bit.  As oil temperatures get too high, thermal degradation occurs.  This is when the oil starts to lose viscosity due to heat and start to break down and becomes more susceptible to "shearing" or oil breakdown. An internal combustion engine like the N55 engine, imparts high shear forces on the motor oil, which is sandwiched between two rotating or sliding forces under load and heat.  "Shearing" is when the molecular structure is essentially torn apart by these mechanical shear forces.  Lower your operating oil temperature will greatly reduce this.  Thus your motor oil is in better shape to protect the bearings in your car's engine, thus improving longevity.

The M235i/335i/435i/M2 comes from the factory with a small oil cooler with a core size of 8.75"x4.75"x1" (222mmx121mmx26mm) which comes out to 41 cubic inches of core.  The Sports Series Oil Cooler system features a large 11"x8"x2" (280mmx203mmx51mm) oil cooler with a core size of 9"x8"x2" (229mmx203mmx51mm).  The Sports Series Oil Cooler comes out to 144 cubic inches  of core which is 3.5 times larger than the factory unit each! 

The Sports Series Oil Cooler mounts to its own box enclosure.  This style box was developed on our 135i Time Attack race car and is brought here to our new F30 applications  Louvers on the backside of the box enclosure ensures airflow through the oil cooler while protecting the oil cooler from road debris, especially debris kicked up from the front tires.  During initial testing, our box enclosure had a big window (open hole) in the back for airflow.  However, throughout the race season, it took so much abuse from rocks, tire and other debris kicked up from the front tires that we had to replace the oil coolers on our Time Attack 135i.  Thus, instead of a big hole for airflow to flow through, we used louvers instead to protect the back side of the oil cooler.  This effectively solved the issue without any affect on performance.  Oil temperatures as well as oil temperature deltas stayed the same. 


Everything needed to install is included with the kits.  No low quality, cheap fittings and lines made overseas used here.  High quality Goodrich anodized black AN fittings and high end Goodrich Stainless Steel Braided Lines are used throughout the kit.  


Picture is the ER N55 Sports Oil Cooler in Silver Finish with Optional Shrouding Kit


435i with Optional Aluminium Shrouding Kit

Evolution Racewerks (ER) BMW N55 Oil Cooler Upgrade (M135i, M235i, 335i & 435i) - 435i with Shroud Kit


435i with Optional Aluminium Shrouding Kit

Evolution Racewerks (ER) BMW N55 Oil Cooler Upgrade (M135i, M235i, 335i & 435i) - 435i with Shroud Kit


M2 with optional Aluminium Shrouding Kit

Evolution Racewerks (ER) BMW N55 Oil Cooler Upgrade (M135i, M235i, 335i & 435i) - 435i with Shroud Kit


M2 with optional Aluminium Shrouding Kit

Evolution Racewerks (ER) BMW N55 Oil Cooler Upgrade (M135i, M235i, 335i & 435i) - 435i with Shroud Kit


View from Engine Bay

Evolution Racewerks (ER) BMW N55 Oil Cooler Upgrade (M2, M135i, M235i, 335i & 435i)



  • Reduces the high oil temperatures that N55 engine produces which helps reduce oil breakdown, improving the longevity of your car!
  • Large 9"x8"x2" (11"x8"x2" with end tanks) Oil Coolers.  Factory stock oil cooler 8.75"x4.75"x1"
  • Over 350% larger capacity than the factory oil cooler!!!
  • Sports Oil Cooler has a total of 144 cubic inches of core!  Factory oil cooler has 41 cubic inches.
  • Available with no finish (silver) or Type III Hard Black Anodizing (for stealth). Hard anodizing helps improve durability of intercooler fins against damage from road debris (rocks).
  • Enclosed box with venting louvers - protects oil coolers from road debris without sacrificing airflow!
  • High Quality Goodrich AN Fittings in Black Anodize - NO China made fittings used here.
  • High End Goodrich Fittings and Stainless Steel braided Oil Lines
  • Retains the factory oil heatsink for additional cooling capacity
  • Optional Aluminium Shrouding to direct airflow through the oil coolers for improved efficiency.
  • Includes all hardware needed to install.  No need to go hunting for hardware to finish the installation.
  • Developed and tested on the race track!
  • Limited Lifetime Warranty.


Type III Hard Anodize Black Finish:

The oil coolers come standard with no finish (silver color).  Just like our intercoolers, we're now offering them with the Type III Hard Anodise Black for guys who want the stealthy look.  With the Type III Hard Anodised finish, it is very hard to tell there is an aftermarket oil cooler on the car. Another added benefit of the Type III Hard Anodising is that it makes the oil cooler fins harder and stronger, which makes it less prone to getting bent/damaged from road debris like rocks etc... We opted for the Type III Hard Anodising over the Type II color anodising which is only asthetics for this purpose only (even though it cost us considerably more to anodize Type III than Type II). We started using the Type III Hard Anodised Black finish on our rally car customer's FMICs years ago.  Rally cars go through tremendous amounts of abuse and it was quite common to take hits on the intercooler from debris on the course.  In fact after 1 event, we would often see a large portion of the intercooler fins bent (killing efficiency) and fixing them after each event was quite tedious.  After the Type III Hard Anodising, we notice a big difference as there was considerably less damage.  Even after hits and even accidents, the FMIC could take more abuse than before.  Testing has shown no noticeable ill-effect from the Type III Hard Anodising on performance (regular spray paint etc... has shown ill-effects on performance).  Eventually, we started utilising the same Type III Hard Anodise Black on our street cars and FMIC applications.  It's only natural we would offer the same finish for our oil coolers.


Kit Options:

When the oil cooler box enclosures are used in conjunction with our optional ducting shroud kits, the oil cooler box enclosure actually seals and forces all the airflow captured by the ducting shrouds through the oil cooler cores.  Improves the oil cooler's effectiveness and efficiency.  The ducting shroud kits are available in aluminium.  These are model and bumper specific so make sure you order the correct shroud kit.



BMW F chassis M2, M135i, M235i, 335i & 435i with the N55 engine 2012+


FREE Next Day UK Delivery

Currently on back order, we aim to deliver you order within 2-3 weeks. We can also ship worldwide, simply contact us for a quote.



Evolution Racewerks (ER) Limited Lifetime Warranty (Non-Transferable)


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Evolution Racewerks (ER)


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