SKU: 55490676852

CSF High Performance Transmission Oil Cooler - BMW / G8X / M3 / M4

Sale price$371.98 Regular price$413.31
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Description

CSF High Performance Transmission Oil Cooler - BMW / G8X / M3 / M4In 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. CSFs new G8X M3 M4 Transmission Oil Cooler for the ZF8 Automatic should definitely be at the top of your list. CSF worked closely with development partner, sponsored race team, and premier local CSF Dealer Studio RSR as well as Time Attack


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. CSFs new G8X M3/M4 Transmission Oil Cooler for the ZF8 Automatic should definitely be at the top of your list.  

CSF worked closely with development partner, sponsored race team, and premier local CSF Dealer Studio RSR as well as Time Attack Teams such as Art of Attack and Velocity Performance on the ZF8 Automatic Transmission Oil Cooler. Their insight, experience, and testing feedback provided invaluable insight into designing the best cooler possible.


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 dont 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.

Dual-Core Advantage

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 CSFs 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 isnt 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)

The CSF Transmission Cooler features a unique dual pass design. You can see in the diagram below how the OEM Coolers 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.

Testing & Feedback

Studio RSR tested the new Transmission Oil Cooler on their G80 M3 Time Attack car during several events. The team competes in Global Time Attack events year round. In addition, their G80 M3 spends many weekends at the track to test new setups and modifications. Their experience and feedback on the real world performance of CSF products has been key in the development of all the new G8X cooling products.

There was a noticeable reduction in transmission temperatures on track. The combination of the transmission temps being in check and the new rock guard gave us extra peace of mind while on both the track and road.

STUDIO RSR

Velocity Performance has also been running the Transmission Oil Cooler along with the Front Mount Heat Exchanger (CSF #8215) on their G82 M4 track car. They have been very pleased with the performance of both.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 55490676852

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De'Ana
Battle Creek, US
★★★★★ 3
Stylish and convenient wristlet, just a small blemish on mine
Color: Vanilla/Soft Pink, Color: Vanilla/Soft Pink
I really like this bag. It’s a great mix between a purse and a wallet, and I love that you can carry it as a standalone piece without needing a bigger bag. It’s perfect for going out when you just want something simple and lightweight. There’s enough space to fit your essentials, including your phone, and it keeps everything secure once it’s closed. One feature I really like is the wristlet strap. Even with it on your wrist, you can still open the bag and grab your phone without having to take it off. That makes it really convenient and easy to access while you’re out. The color is beautiful, and overall it feels well made like you would expect from this brand. The only small issue I had was a slight blemish on the front of my bag. It’s not very noticeable to others, but I saw it right away, and it was a little sticky at first. I was able to clean it some, but there are still faint marks left. It’s minor, but something I wouldn’t expect on a bag like this. Overall, it’s a stylish and practical wristlet that’s great for everyday outings or quick trips.
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Reviewed in the United States on March 29, 2026
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TOM
Alexandria, US
★★★★★ 5
EXCELLENT!!
Color: Black
The product arrived on time and matched the description well. Overall, the quality seems solid and everything works as expected so far. Setup was simple and the item feels well made for the price.
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Reviewed in the United States on May 11, 2026
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StayinGroovy
Lowell, US
★★★★★ 5
Sleek, Durable, and Super Practical
Color: Black, Color: Black
Very nice quality overall—the material feels soft but still durable, like it’ll hold up well over time. The sleek black design is super versatile and pairs easily with different outfits or bags. The wristlet strap is a great addition, and the connector feels sturdy and well made. Inside, there are plenty of card slots, and the exterior coin pouch is a nice bonus for quick access. The snap closure is strong and secure, which makes it feel reliable for everyday use.
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Reviewed in the United States on April 20, 2026
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John Henry
Lexington, US
★★★★★ 5
Versatile Wristlet for Travel or Everyday Use
Color: Vanilla/Soft Pink, Color: Vanilla/Soft Pink
This is a very nice wristlet with a clean, polished look. The color combination of the off-white exterior and dusty pink interior gives it an elegant and timeless feel, as expected from this brand. One of the features I liked most is the ability to carry a phone inside. It did fit my phone without a case, and the snap closure helped keep it secure. With a bulkier case, the fit was more limited, so that’s something to keep in mind. It can be used on its own with the wristlet strap or placed inside a larger purse, which makes it versatile for different situations. There’s plenty of room for essentials, including multiple credit cards, an ID window, a zippered pouch for coins, and space for cash. The layout is well thought out and keeps everything organized. The stitching and overall construction appear well done, with no visible flaws. Overall, this is a stylish, functional wristlet that offers good organization and flexibility for everyday use or travel.
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Reviewed in the United States on March 21, 2026
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Brenda
Alexandria, US
★★★★★ 5
Purse
Good quality and I love my mini purse! Easy to grab and go!
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Reviewed in the United States on March 3, 2026

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