Both of these oil coolers went through 2+ years of development and multiple rounds of prototypes. The CSF Porsche 914-6 Engine Oil Cooler’s world debut at Rennsport Reunion 2023 was met with incredible support and enthusiasm from the community. Obviously air-cooled enthusiasts know the struggles associated with the oil cooler located on the engine block of the old flat six motor. With the 914-6 swaps/conversions becoming ever more popular, this new Oil Cooler will be a game changer for classic Porsche owners and restoration shops.
While the original design was effective at the time, they have not aged well. In addition, there have been no updates to the design and original replacement units can be hard to come by. When the CSF 911 was being built, CSF realized this was a much needed part for the air-cooled community and set out to design something special.
Features
KEY FEATURES
- OEM+ / High-Performance recreation of the original Behr Oil Cooler
- CNC Machined mounting plate with helix design for strength and pocketed for weight savings
- Modern Tube & Fin core with lower pressure drop and higher heat dissipation than the original
- All OEM Behr features replicated on the billet mounting plate and cooler case
- Optimized ID and flow characteristics of oil pipe for maximum oil flow through the vehicle’s oil system
- Complete drop-in fit, absolutely no modifications to install
- Each unit is Individually Leak and Pressure Tested
- 10 year warranty
- New OEM coolers from Porsche are extremely scarce/hard to source and cost $1,300+
CORE 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.
DESIGN & ENGINEERING
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 its 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.
ATTENTION TO DETAIL
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.
NEW TO THE CORE
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.
BILLET BASE PLATE
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.
OEM+ LOOK AND UPDATES
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. 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.
CSF VS OEM PERFORMANCE TESTING
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.
PREMIUM PACKAGING
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.
REPLACES OEM PART NUMBERS
90110705903, 90110705901
WARRANTY
Limited warranty, 10 years, covering CSF High-Performance Cooling Systems under normal use and service (original purchaser).
Vehicle Compatibility
What’s Included
- 1x CSF Oil Cooler
Availability & Shipping
In stock and ships from a US warehouse, typically within 1–3 business days. Standard Shipping applies to every order — rates are calculated at checkout, with tracking provided once your order ships. Some items may require additional processing time depending on the specific product and current demand. Track your order any time at eurospeed.co/pages/track for a live delivery estimate.
Delivery time depends on the product. Most in-stock parts ship within days, while carbon fiber and made-to-order items may require production time before they ship. For the specific timeline on any item, check the Availability & Shipping section on that product’s own page — the guide below covers our general shipping types.
Shipping Overview
Depending on the item, free air freight may be available for select carbon fiber components, with estimated shipping around 1–2 weeks after dispatch. Larger hoods, oversized body components, and certain made-to-order items may require sea freight and longer delivery windows. If timing is important, please contact us at support@eurospeed.co before placing your order.
Shipping Coverage
EuroSpeed ships to customers across the United States and internationally. Shipping is included in the price of eligible products for your convenience and covers the initial cost of delivery to your destination.
Import duties, taxes, clearance fees, or customs charges required by your destination country are not included and remain the recipient’s responsibility.
Order Processing & Fulfillment
Every order is reviewed, processed, and prepared before shipment. Most in-stock products are processed within 1–3 business days, though some orders may take up to 5 business days depending on fulfillment location, product type, order volume, or courier pickup timing.
EuroSpeed stocks select high-demand products at our U.S. facility and international fulfillment centers. Because our catalog includes many vehicle-specific and specialty parts, not every product is held in-house at all times.
Some orders may ship through our trusted fulfillment network, which may include verified manufacturing partners, authorized distributors, regional warehouses, and international fulfillment centers.
- Orders may ship from a U.S. warehouse, international warehouse, manufacturer, or authorized fulfillment partner.
- Some products may require additional handling, processing, production, or quality-check time before shipment.
- Orders enter fulfillment shortly after being placed and may no longer be eligible for cancellation once processing, production, or shipment preparation begins.
Custom, Made-To-Order & Oversized Items
Custom, made-to-order, and oversized product categories may include carbon fiber steering wheels, hoods, trunk lids, fenders, front lips, splitters, side skirts, diffusers, bumpers, body kits, widebody components, select spoilers, rear wings, and other large carbon fiber components.
Many carbon fiber items are made to order. Some products may already be stocked and ready to dispatch when available, but if inventory is unavailable, your purchase reserves the next available production slot instead of waiting for a separate restock listing.
Production time: Production can take 1–4 weeks depending on product type, selected options, finish, current queue, and quality-control timing.
Shipping time: Shipping can take 2–10 weeks depending on item size, freight method, destination, customs processing, carrier delays, warehouse transfers, and final delivery location. Carbon fiber steering wheels typically ship faster, with shipping usually taking 3–7 business days after dispatch.
By purchasing custom, made-to-order, or oversized items, you acknowledge and accept the extended production, fulfillment, and shipping timelines associated with these products.
Tracking Updates & Delays
All orders receive a tracking number once generated by the courier. Tracking may take 2–3 business days after dispatch to show movement in the courier’s system.
Certain international, oversized, or freight shipments may show limited updates during transfer between fulfillment locations, warehouses, customs, or final-mile carriers. In some cases, tracking is provided or begins updating once the item reaches a regional warehouse, local carrier, or final delivery network.
Shipping timelines are estimates and are not guaranteed. Delays caused by high order volume, weather conditions, customs inspections, carrier disruptions, production queues, warehouse transfers, holidays, or other external factors may occur and are outside of EuroSpeed’s direct control. These delays do not qualify for cancellations or refunds unless the carrier officially marks the package as lost.
Delivery Responsibility
Upon delivery, carefully inspect the item for visible defects or damage before signing for it. If the item is damaged or not as expected, do not accept the package. Once a damaged or defective product is accepted, EuroSpeed cannot cover return shipping costs.
EuroSpeed is not liable for packages marked as delivered by the carrier. If a package is lost, stolen, or missing after being marked as delivered, the customer must file a claim directly with the shipping carrier. Our team will assist with available documentation when needed.
Shipping addresses typically cannot be changed once an order has been marked as shipped. If an address change is possible through the carrier, any carrier redirect, correction, or address-change fee will be the customer’s responsibility.
Please ensure your shipping address is entered correctly at checkout. Orders shipped to incorrectly provided addresses are the customer’s responsibility. EuroSpeed is not responsible for failed deliveries, additional shipping costs, lost packages, or refunds caused by incorrect shipping information, failure to accept delivery, or failure to collect a package from the post office or carrier pickup location within the required time frame.
Customs, Duties & Import Fees
EuroSpeed’s free shipping policy does not include import fees, taxes, duties, clearance charges, or other fees required by your destination country. These charges are the responsibility of the recipient, and EuroSpeed is not responsible for any duties or taxes requested by local customs.
Most shipments clear customs automatically through the shipping provider. However, if additional information is needed to complete the process, our team will assist where possible to help ensure a smooth resolution.
If customs clearance fails and the item is returned or destroyed:
- EuroSpeed reserves the right to deny refund claims.
- Returned items may incur return shipping fees, which will be deducted from any eligible refund.
- Items deemed too costly to return may be destroyed, and no refund will be issued if this occurs.
Package Protection
For added peace of mind, EuroSpeed offers ShipInsure package protection as an optional service at checkout. When selected, this service provides coverage for lost or damaged packages. EuroSpeed is not responsible for shipping delays, lost packages, or damaged items if purchase protection is not selected during checkout.
- Protects against lost or damaged packages.
- Must be selected at checkout.
- Not all oversized body kit purchases are eligible. Please contact us before ordering if custom insurance arrangements are needed.
To file a claim, please visit our Claims Center.
- Claims must be filed within 14 days of delivery.
- Packages stuck in transit for 14 days are considered lost.
- Damage claims typically require photo evidence.
- A 2-day buffer after delivery may apply before lost or stolen claims can proceed.
- Police reports may be required for orders over $500 or where fraud is suspected.
- “Damaged” means the item is broken and unusable.
Questions?
For questions about your order, shipping timeline, customs clearance, or delivery status, please contact our team at support@eurospeed.co. We’re here to help.
Product Installation & Use Disclaimer
EuroSpeed is not liable for any damages, injuries, fitment issues, installation issues, or vehicle-related problems resulting from the installation, modification, misuse, or use of our products.
Products should be installed carefully and used only as intended. For complex installations, electrical components, performance parts, body components, or products requiring modification, professional installation is recommended to help ensure proper fitment, function, and safety.
Any damage caused by improper installation, misuse, modification, or failure to follow installation requirements is the sole responsibility of the customer. By purchasing, installing, or using this product, you acknowledge and accept all associated risks.
CSF Race Oil Cooler for Porsche 914-6 OEM+
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