The original Behr Cooler was designed back in the 1960s and definitely shows its age at this point. Original coolers can be ultrasonically cleaned and refurbished but there is good chance they will start leaking after cleaning. The cleaning process may cause the coolers to fail due to it's old and brittle materials, or it can remove corrosion and debris that has kept the original from showing the leak beforehand. However, the core is not the only source of leaks. The OEM cast base plate that mounts to the block can become slightly warped or aging porosity can cause the seals to not seat correctly and leak.The old original coolers aren't the only issue though. CSF has gotten many first hand reports of brand new OE coolers from Porsche's revamped "Porsche Classic" Catalog leaking within a few months of installation. Apparently the new items available from Porsche are not built as well as the original Behr coolers. CSF has now brought to market a modern OEM+ solution to this vintage design.For development of the 914-6 Engine Oil Cooler, CSF teamed up with the leading Porsche engine building experts at SV Auto. Their deep knowledge of classic Porsche engines and expertise in restoration gave CSF invaluable insight into how to best approach the design and construction. Long time R&D Partner and CSF Dealer Brian Day at Euro Parts West was also a critical partner in the development of the oil cooler design.CSF's goal for the 914-6 Oil Cooler was to recreate the original cooler with a modern interpretation of the design while improving functionality and reliability. To accomplish this, CSF spent countless hours in research and development. Brain Day was instrumental in really helping CSF engineers understand the 914-6's oil cooling system. These details and deep understanding allowed for proper engineering and creating a cooler that could fit such a wide variety of models. Improving upon a design starts with understanding the system as a whole. Every detail of the cooler was analyzed from core strength to oil flow restrictions. 3D scanning of the flat-6 engine blocks and OE Coolers gave CSF the ability to ensure optimal fitment as well as see what room there was for improvements.The CSF units utilize a modern and robust tube and fin core specifically designed for this cooler. This new core has higher flow, less pressure drop, and is more durable than the original design. In addition to the upgraded core, CSF added support/strength bars between the tubes. These bars increase the burst pressure which has been tested to 290 psi (20bar) without leaking. The high-performance core uses 7 cooling tubes with 8 rows of fins. Between the ultra efficient fin design and high flow tubes, the CSF cooler is 10% more efficient than a brand new OE unit and up to 25% more efficient than a used unit.Because the base plate of the cooler is also a common problem area, CSF sought to improve this area as much as possible. Instead of the original cast design, the CSF cooler uses a CNC machined billet aluminum plate. This offers a perfectly flat mounting surface which is both stronger and more resistant to warping over time. You'll also notice a special helix design which adds strength while keeping weight at a minimum. The O-Ring recesses are CNC milled into the billet for a perfect fit and seal. There is nothing worse than getting your engine put together only to find a minor oil leak at the O-Rings between the block and the oil cooler. You can now confidently install your oil cooler knowing you will not get any leaks from improper O-Ring seating.CSF understands Porsche purists want to keep an OEM look even when upgrading the performance and reliability of their 914s. This was a driving factor behind many of the cosmetic features of the oil cooler. The top of the cooler is stamped with the OE Part Number just below the CSF logo. In addition, the cooler comes in a Titanium color Thermal Heat Dispersion Cerakote finish. This advanced finish is durable, improves heat dissipation, is anti-corrosive, and offers a very classy OEM+ look to the cooler. A modern upgrade over the original. No details were overlooked in the design of the CSF cooler. The curvature of the case matches the original precisely and includes all the fine details. The spark plug aperture matches up perfectly with the valve cover for a perfect fit. Built into the machined base plate are small but important details such as the raised mounting pads and strengthening ridges.Extensive testing was done between the CSF Oil Cooler 911/930 Turbo and OEM Oil Cooler. Both coolers share the same design, so the test results would be the same between the two coolers. For these tests, CSF was able to procure a brand new old stock Behr OEM unit. This offered a true benchmark comparison in oil flow, pressure drop, and heat dissipation. Tests were conducted in CSF's factory wind tunnel under controlled conditions. The data shows the CSF Oil Cooler outperforming the OEM unit by a substantial margin in Heat Dissipation and Pressure Drop. At equal flow rates the CSF cooler was 8% more efficient on average at dissipating heat and offered 6-8% less pressure drop. These results were before applying the Thermal Heat Dispersion Cerakote which further improves the heat dissipation performance.Each cooler is packaged in a premium box with laser cut foam inserts. Therefore you can be confident your oil cooler is protected and secure as it is shipped.CSF offers the best and most advanced Oil Coolers on the market. So when it comes to keeping your engine oil temps down as you push your Porsche 914-6 hard on the street or track, a CSF Oil Cooler is the obvious choice.