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Description
High Performance Heat Exchanger for 2019-25 BMW 330i/M340i/430i/M440i D780-0003Dinan High Performance Heat Exchanger 2019 2025 BMW 330i M340i 430i M440i The OE thermal management system for the B4x B58 G chassis BMW and Toyota GR Supra offers an improved formula from prior generations. With a setup where engine coolant is also re routed through the heat exchanger, the system effectively assists in overall engine cooling as well as charge cooling. However, like its predecessors, it has room for improvement as it can be
Dinan High Performance Heat Exchanger - 2019-2025 BMW 330i/M340i/430i/M440i
The OE thermal management system for the B4x/B58 G-chassis BMW and Toyota GR Supra offers an improved formula from prior generations. With a setup where engine coolant is also re-routed through the heat exchanger, the system effectively assists in overall engine cooling as well as charge cooling. However, like its predecessors, it has room for improvement as it can be overwhelmed when the system is taxed aggressively or as power levels are increased. Once overburdened, this results in the undesirable outcome of power being diminished. Avoidance of this unwelcome scenario can be attained though with a Dinan heat exchanger that improves the overall thermal management system so everything runs cooler and more efficiently while being budget friendly.
Features:
- Average of 8.7? C reduction in charge air temps with a maximum reduction of nearly 12? C over 30 successive WOT pulls
- General improvement to the efficiency of the thermal management system, inclusive of engine cooling
- 45mm thick Dinan core vs. 26.75mm thick stock cooler core
- 68% more cooling surface area and volume than stock
- Reduces the tendency to heat soak / go in to limp mode
- Durable bar and plate design that is less susceptible to damage from road debris
- Pressure tested, 100% TIG welded, Aluminum construction
- Direct fit replacement with no modifications required
Specs:
| Brand | Dinan |
|---|---|
| Dinan Point Value | 2 |
| Emission Code | 7 |
| Labor Time (Hours) | 3.7 |
| Product Type | Heat Exchanger |
| Warning | California Proposition 65 |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2021-2025 | BMW | 430i | Base |
| 2019-2024 | BMW | 330i | Base |
| 2019-2024 | BMW | Z4 | sDrive30i |
| 2019-2024 | BMW | Z4 | M40i |
| 2020-2021 | BMW | Z4 | sDrive M40i |
| 2023-2024 | BMW | M240i | Base |
| 2022-2024 | BMW | M240i xDrive | Base |
| 2022-2025 | BMW | 230i | Base |
| 2023-2025 | BMW | 230i xDrive | Base |
| 2019-2024 | BMW | 330i xDrive | Base |
| 2019 | BMW | 330i xDrive | Base |
| 2021-2025 | BMW | 430i xDrive | Base |
| 2022-2025 | BMW | 430i xDrive | Base |
| 2022-2024 | BMW | 430i Gran Coupe | Base |
| 2023-2024 | BMW | 430i xDrive Gran Coupe | Base |
| 2020-2024 | BMW | M340i | Base |
| 2020-2024 | BMW | M340i xDrive | Base |
| 2021-2025 | BMW | M440i xDrive | Base |
| 2021-2024 | BMW | M440i | Base |
| 2022-2025 | BMW | M440i | Base |
| 2022-2024 | BMW | M440i xDrive Gran Coupe | Base |
| 2022-2024 | BMW | M440i Gran Coupe | Base |
| 2020-2025 | Toyota | GR Supra | Base |
| 2020-2025 | Toyota | GR Supra | Premium |
| 2021-2024 | Toyota | GR Supra | Base |
| 2021-2022 | Toyota | GR Supra | A91 Edition |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 29 reviews
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Product Reviews
★★★★★ 5
Cooling and holds shape.
Color: Blue-ice Plus, Size: Queen(Pack of 2), Color: Blue-ice Plus, Size: Queen(Pack of 2)
Very nice pillow for the price is also holding up well and holding shape very cool and comfortable to the touch. Best pillow I found in a long time.
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Best Pillow Ever
Color: Blue-ice Plus, Size: Queen(Pack of 2)
Best pillow ever. Although it still gets "hot", it does take longer to get "hot". I love this pillow. I was buying a new pillow almost every 3 months. Other pillows would either remain rock hard or go flat. I was concerned at first when reading the description as I though the memory foam would be big pieces. They are soft fluffy pieces. I had to remove almost half of the foam to get the pillow to what works for me. I have not had to put any filler back in. Maybe in a couple of more months I may have to put a bit more in, but it is holding it's shape and not going flat. I do fluff it every night. This helps. I am a stomach sleeper. I have bought the expensive purple pillow and hated it so much I gave it to my daughter. This QUTOOL Pillow is the best! I bought a 2 pack. Have not used the other pillow yet, but I feel I may actually go years for once without having to buy a pillow as I have the 2nd one set aside if the first one gets to a point in need replacement. I have bought Dollar Store pillows. I have bought $300 pillows. None of them even come close to this pillow and the way you can adjust this pillow for you. The pillows came in a white mesh like bag. I keep all the unused "stuffing" in this bag. I have it hanging in my closet and I just fluff the bag once a month to keep the filling fresh so it is ready if and when I need it. Coming from someone who has trouble staying asleep, neck issues, a stomach sleeper who hate those flat pillows manufacturers think stomach sleepers like but actually hate, buy this pillow. Just buy it. Best Pillow for a picky person like me. Buy 2 or more so if you have to stay at a hotel, you can take your own pillow.
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Reviewed in the United States on June 15, 2025
★★★★★ 4
Slippery Pillow
Color: Blue-ice Plus, Size: Queen(Pack of 2)
Nice and cooling but it’s so slick my pillow sheet doesn’t want to stay on.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Foam Mattress NEEDs Foam Pillows
Color: Blue-ice Plus, Size: King(Pack of 2), Color: Blue-ice Plus, Size: King(Pack of 2)
10 stars!! Quality foam, structure & price. Best bang for my buck.
HRV, readiness & total sleep score metrics increased drastically this week. See screenshot :)
Support:
Molds and cushions every crevice under my neck and above shoulders. So comfy
Size:
Adjustable loft but king length is perfect to hug and rest your head. Love love love. The 1st 2 nights were uncomfortable with pillow as is, first night I was up at 3am half asleep pulling foam out but wasn't enough. The second night at 2am I pulled out more stuffing. I was getting frustrated.. my Oura ring showed both nights I was awake every hour. Not good. Before the 3rd night I pulled enough to fill the bag the 2 pillows arrived in. Boom -8hrs sleep and for the first time ii years I achieved 17% Deep sleep. Huge.
Weight:
Perfect weight with adjustment. Squishy and molds to b the contour of my neck and shoulders
Softness:
Like the baby bear.. just right.
Comfort:
Very comfortable after removing 30% foam in both pillows. I actually now have enough to make a 3rd pillow, replace old foam, or adjust OGs, Still to early to measure.
If you have a foam mattress that contours your body but not your head you'll end up with neck and/or back pain from head being elevated- not sinking/molding the body into a foam mattress.
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Reviewed in the United States on July 1, 2025
★★★★★ 3
These are not sized correctly - beware
Color: Blue-ice Plus, Size: King(Pack of 2), Color: Blue-ice Plus, Size: King(Pack of 2)
Edit: I was going to return these pillows but the seller contacted me and offered a full refund due to the size issue without having to send the pillows back.
I am happy with this and happy to keep them on a spare queen size bed as they really are nice pillows. Just the wrong size.
pros: they are a nice pillow and the cooling feature is really great, and you can adjust to your liking
cons: absolutely wrong size. Ordered King, tag says king, all measurements on listing and tag say 20x36, in reality they are more like 20x30. Definitely Queen pillows being sold as King.
I did not see any reviews at first about size issues but after I got these and did a search it does look like others have had the same problem.
A shame, would have given them a great review if they were the correct size
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Reviewed in the United States on February 23, 2026