Description
In stock form the G8X is an impressive machine, but its tuning potential is where the magic really happens. However, whenever you start pushing power on a car, you need to make sure the cooling system can keep up. CSF’s new G8X M3/M4 Transmission Oil Cooler for the ZF8 Automatic should definitely be at the top of your list.
Design, Development, and Testing
While the OEM Transmission Cooler is adequate for the G8X in stock form, it starts to come up a bit short on modified/tuned vehicles. Specifically ones that see heavy track/competition use. Transmission oil temperatures have a major impact on the shifting performance of your automatic transmission. If the fluid passes optimal temperatures you will start to see some delays in shifting. Sluggish shifting can be quite frustrating, but the real concern is the damage that can be done to the transmission when temperatures get too high. There are often cases where drivers don’t notice the change in shifting performance due to the gradual onset, but the damage is still being done slowly on a very expensive and important component.
By changing from the OEM single core design to a dual core, CSF was able to increase the overall volume by 194%. This design offers a drastic improvement in heat dissipation and increases the fluid capacity of the coolers by ~94%. Utilizing CSF’s AC Condenser Technology, a 1-Row Super-High Pressure 16mm 9-Channel Microtube design optimizes oil flow and offers maximum surface area contact. These features combine to offer the best possible heat dissipation from the system.
Rock Guard
CSF knows the kind of punishment the front of a car can take on or off the track. The wrong bit of debris flying through the front grille can quickly punch a hole in a cooler. Because the Transmission cooler sits at the very front of the center cooling stack, it is quite vulnerable to damage. In addition, “open face” race style grilles have become quite popular on the G8X. These grilles can add to the risk of debris passing through.
The factory grille is the only form of protection for the OEM transmission cooler. However, this still isn’t the level of protection many race teams and enthusiasts are comfortable with. To address this concern, CSF has incorporated a replaceable rock guard to keep your cooler safe and your G8X running strong in the event of debris making it through the front grille.
| Feature | OEM | CSF |
|---|---|---|
| Core & Tank Dimensions | 553mm (W) x 155mm (H) x 28mm (D) | 555mm (W) x 191mm (H) x 44mm (D) |
| Tubes & Rows | 13 Tubes & 14 Rows | 15 Tubes & 16 Rows |
| Fin Height | 8mm | 8mm |
| Design | Single Core Single Pass w/ Feed Pipe | Dual Core Dual Pass (front to back) |
CSF High-Performance Transmission Oil Cooler for BMW G8X M3/M4 ( CSF #8221 ) Features:
Dual-Core Design
194% Increase in Core & Tank Volume
94% Increase in Fluid Capacity Compared to OEM (CSF 1700ml vs. OEM ~875ml)
Two 22mm Stacked Cores = 44mm Core Thickness vs. OEM 28mm Core Thickness
Rear Cooler: 16 Rows vs. OEM 14 Rows (191mm Overall Height vs. OEM 155mm)
Front Cooler: Additional 16 Rows
Made with CSF’s AC Condenser Technology Using a 1-Row Super-High Pressure 16mm 9-Channel Microtube for Optimal Oil Flow and Maximum Surface Area Contact
Utilizes OEM Top/Bottom Rubber Seals for Optimal Airflow
OEM Style “Quick Connect” Inlet/Outlet Connections
Drop-in Fit Requires No Modifications to Install
Can be Installed With CSF’s High-Performance Heat Exchanger (CSF #8215) or with the OEM Cooling System
2-Year Limited Warranty
Ideal for Road Racing, Drag Racing, and Vehicles With Increased Performance and/or Transmission Tuning
Applications:
2021+ BMW G80 M3 (incl. Competition) – ZF8 Auto Only
2021+ BMW G82/G83 M4 (incl. Competition) – ZF8 Auto Only
OEM Part Number:
BMW: 17-11-8-095-284
MSRP: $629.00 USD / MAP: $599.00 USD
The CSF Transmission Cooler features a unique dual pass design. You can see in the diagram below how the OEM Cooler’s single pass design works by flowing across the core and back through a feed pipe. While perfectly functional, this gives some extra height to work with if you can eliminate the feed pipe.
The engineers at CSF came up with this unique design to take advantage of the extra vertical space while adding extra capacity and a dual pass system. This design essentially doubles the cooling capacity while still fitting perfectly in the OEM position with no modifications necessary.
