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Oil Cooler

BMWs use an external oil cooler to regulate the temperature of engine oil and prevent a breakdown in viscosity and lubrication characteristics. If yours has suffered damage or developed a slight leak, make sure to replace it and keep the engine oil where it is supposed to be. Keeping this system properly serviced will significantly improve performance and increase engine life.
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OEM Rein Aluminum Oil Filter Housing And Heat Exchanger - BMW B46A B4...
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Rein - Corporate Logo
T#:31059484
Part#: 11428596283
In Stock
$ 328.99 USD
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$ 328.99 USD
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The new upgraded Rein housing features full aluminum construction to eliminate many of the common causes for failure of the OE part, such as cracking or warping, and to ensure increased durability for a longer, problem-free service life. For easy installation, the oil filter cartridge and mounting hardware are included, as well as a pre-installed oil cooler. To ensure optimal performance, high-performance gasket materials are used throughout the assembly FEATURES & BENEFITS: Upgraded aluminum construction for increased durability and performance Pre-installed oil cooler for convenience Includes mounting hardware and oil filter cartridge High performance gasket materials used throughout the assembly
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Rein Radiator Hose - F26
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Rein - Corporate Logo
T#:592203
Part#: 17127646150
Ships in 1-2 days
$ 46.99 USD
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$ 46.99 USD
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Doing a cooling system refresh, or just replacing worn out and soft old hoses? Why settle for stock when you can get the added life and heat tolerance of silicone hoses? Retains OEM fitment without the OEM hose flaws, silicone will resist breaking down and getting soft as coolant heat cycles and will last longer than the OEM rubber hoses.
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M50 Oil Cooler Cap
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Rally Road - Corporate Logo
T#:401463
Part#: B015-8BL
Ships on Jul 28, 2026
$ 243.99 USD
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$ 243.99 USD
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Rally Road M50 Oil Cooler Cap Adapter Kit
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Rally Road - Corporate Logo
T#:401511
Part#: RROCCK
Ships on Jul 28, 2026
Starting at $ 243.99 USD
Free Shipping
Starting at $ 243.99 USD
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Rally Road Productions, Inc. is a team supported by a group of people with great abilities in their area of expertise. From the "web guy" and driving instructor friends, to owners of various machine shops, they have surrounded ourselves with people that can be trusted to create and manufacture quality products. This is the key to ensuring everything that they sell will perform as it was intended. The goal is to increase customer satisfaction and make the customization or performance enhancement of your vehicle a more enjoyable venture.

This oil cooler system is race tested and proven to outflow the euro M3 oil filter housing. Additionally, this particular system uses a sealing mechanism to direct the oil flow through the cooler lines and then through the oil filter.  Other cooler caps do not provide this seal and therefore the external oil coolers and lines act as a "balloon".  The lines and cooler are pressurized, but oil does not flow through them.  Flowing oil means it is being cooled and not just acting as an external reservoir.

Flow testing reveals that the oil cooler cap will outflow the Euro M3 Oil Filter Housing by more than 80% at the same, pressure, RPM, and oil temperature. In the upper RPM range, there is nearly a 100% improvement in flow from the RallyRoad oil cooler cap when compared to the Euro M3 oil filter housing.  This is a massive improvement over OE and is a worthwhile upgrade, especially in engines that see severe duty.

Features:

  • -8AN o-ring ports to provide a leak free fitting without the use of Teflon tape or sealant used by other oil cooler caps.
  • Viton o-rings are used throughout to maintain function and sealing in a high-temperature oil environment.
  • Use of the stock filter cap bolt to reduce cost and simplify installation.
  • An internal sealing mechanism to direct oil flow through the oil cooler and through the filter.
  • 1/8" NPT side port for external oil pressure gauge.

Kit Includes:

  • Oil filter cap with fittings
  • Oil filter sealing ring
  • BMW MANN Oil Filter and gasket

This part fits the following BMWs
1992-1999 E36 323i 325i 325is 328i 328is

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Rein Oil Cooler Gasket - Filter Housing to Oil Cooler
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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Rein - Corporate Logo
T#:591696
Part#: 11427525335
In Stock
$ 15.99 USD
Free Shipping on orders $49 and up
Common cause of oil leaks can be easily repaired