CSF 8371 Universal Large Single-Pass Oil Cooler M22 x 1.5 12.0L x 9.33H x 2.16W

Applications

Universal fit - suitable for any custom build or performance application requiring fluid cooling, including:

• Engine oil cooling
• Transmission oil cooling (automatic or manual/DCT)
• Power steering fluid cooling
• Differential fluid cooling
• Water/coolant heat exchanger

Fitment Notes

• Universal application - requires custom line routing, brackets, and fittings appropriate to the specific installation.
• Inlet/outlet threads are M22 x 1.5. AN-16 connections are directly compatible with the M22 x 1.5 bung using standard AN-to-M22 adapters (not included).
• Two 1/8 NPT ports are located on each end tank for installing temperature sensors or bleeding the system during initial fill.
• Mounting holes are M8 x 1.25 threaded bungs (flush-mount, triangular arrangement on each end). Hardware not included - standard M8 x 1.25 fasteners are widely available.
• The core can be clocked/oriented in any direction to accommodate a wide range of mounting configurations.
• This cooler has been used in production vehicle-specific applications including the CSF Ford GT Transaxle Oil Cooler - confirming real-world fitment integrity at high stress levels.

Features

• Proprietary "Aero-Flow" Bar/Plate Core - CSF's unique bar design reduces weight compared to traditional bar/plate cores while maintaining full structural integrity and maximizing both oil and airflow through the core.
• TIG-Welded End Tanks - eliminates the leak risk associated with brazed construction; TIG welding delivers superior bond strength under sustained thermal cycling and vibration.
• Massive 1.5L (1.6 qt) Fluid Capacity - the largest in CSF's universal oil cooler lineup, providing substantial thermal mass and extended residence time for maximum heat rejection per pass.
• M22 x 1.5 Inlet/Outlet Connections - TIG-welded to the end tanks with an internal radius machined for maximum flow; compatible with AN-16 fittings via standard adapters, giving builders broad flexibility in line selection.
• Vertically Oriented Inlet/Outlet - a departure from CSF's earlier horizontal-port oil coolers, this orientation simplifies line routing in setups with larger mounting footprints or where horizontal space is available.
• Dual 1/8 NPT Ports (per end tank) - allows temperature sensor installation for oil temp monitoring, or serves as bleed ports during initial system fill.
• Triangular Flush Mounting System (M8 x 1.25) - three mounting holes at each end of the core provide a stable, vibration-resistant mount compatible with a wide range of custom bracket designs; uses commonly available hardware.
• Clocks in any orientation - the cooler can be mounted horizontally, vertically, or at any angle, maximizing packaging flexibility across different build types.
• High robustness and debris tolerance - CSF's bar/plate core construction is significantly more resistant to rock strike and debris impact than plate-type/stacked-style coolers, and can withstand higher peak burst pressure.

Specifications

• Part Number: CSF #8371
• Type: Universal Single-Pass Bar/Plate Oil Cooler
• Core Style: "Aero-Flow" Bar/Plate
• Overall Dimensions: 12.0" L x 9.33" H x 2.16" W
• Fluid Capacity: 1.5L (1.6 qt)
• Inlet/Outlet Connection: M22 x 1.5 (TIG-welded, AN-16 compatible)
• Sensor/Bleed Ports: (2) x 1/8 NPT per end tank
• Mounting: Triangular flush-mount holes, M8 x 1.25 thread (each end)
• Mounting Orientation: Clocks in any direction
• Construction: All-aluminum, TIG-welded end tanks
• MSRP/MAP: $499.00 USD

Included Components

• 1x CSF #8371 Universal Large Single-Pass Oil Cooler

Note: Line fittings, mounting hardware, AN adapters, and temperature sensors are not included and must be sourced separately.

Product Description

The CSF #8371 is the largest cooler in CSF's growing lineup of universal high-performance oil coolers, and the newest addition to the family CSF introduced in 2019 when they reimagined what an aftermarket oil cooler could be. It adapts the same rugged Aero-Flow bar/plate core that has defined CSF's oil cooler reputation - lightweight, durable, and optimized for maximum oil and airflow - into a single-pass format with vertically oriented inlet and outlet ports. This traditional top-inlet/bottom-outlet arrangement simplifies line routing in builds where a larger mounting footprint is available and where horizontal clearance makes the vertical-port layout more practical than CSF's earlier horizontal-port designs.

At 12.0" x 9.33" x 2.16" with a 1.5-liter fluid capacity, the #8371 provides substantially more thermal mass and residence time than smaller universal oil coolers, making it appropriate for high-output builds with significant sustained heat loads - turbocharged engines, high-ratio differential cooling, performance transmissions, and supercharged applications. The M22 x 1.5 threaded bungs are TIG-welded with an internal radius machined for unrestricted flow, and accept AN-16 fittings via adapter, giving builders flexibility in line size and routing. Two 1/8 NPT ports on each tank allow temperature monitoring or air bleeding during initial system fill.

The triangular flush-mount hole pattern at each end accepts standard M8 x 1.25 hardware and accommodates a wide range of custom bracket configurations. Because the core can be clocked in any orientation, the cooler integrates cleanly into tight packaging environments that would challenge fixed-mount designs. CSF's TIG-welded end tank construction provides higher burst and leak resistance than brazed alternatives, which is particularly important in debris-prone locations and high-vibration installations. The #8371 has been validated in a production vehicle-specific application - the CSF Ford GT Transaxle Oil Cooler - confirming its real-world durability at elevated stress levels.