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Description
Dinan High Performance Heat Exchanger - BMW / F2X / F3X / 230i / M240i / 330i / M340i and moreThe factory B4x B58 heat exchanger is not built to cater to the rigorous demands often associated with a modified build. The thin core is easily overwhelmed with IAT's rising dramatically once pushed beyond a few successive WOT pulls or even a few minutes at the track. This elevation in temperature gives way to the factory ECU fail safes pulling timing and reducing overall power in order to keep the system from overheating to the point of permanent
The factory B4x/B58 heat exchanger is not built to cater to the rigorous demands often associated with a modified build. The thin core is easily overwhelmed with IAT's rising dramatically once pushed beyond a few successive WOT pulls or even a few minutes at the track. This elevation in temperature gives way to the factory ECU fail safes pulling timing and reducing overall power in order to keep the system from overheating to the point of permanent damage. On an application where enjoyment is directly attributed to pushing the platform to its limits this constraint to cooling presents a challenge for the automotive enthusiast.
The Dinan B4x/B58 heat exchanger for the F2x/F3x chassis assists in mitigating these issues with a more robust core (48mm thick Dinan core vs. 27mm thick OEM core) that wields 78% more heat transfer surface area for improved cooling capacity. The significant increase in core thickness requires unique "L" shaped end tanks to be incorporated as well, which also contributes to the overall thermal mass (ability to absorb, store, and release heat) improvement beyond the OEM setup. With up to a 15° IAT delta recorded over stock the Dinan heat exchanger is ready, and able, to assist in extending your vehicles ability to deliver maximum performance time and time again for your driving enjoyment!
ENDURANCE TESTING
Charge Air Temp Reduction, or Intercooler Temperature drop (Intercooler dT), is a measurement of the temperature drop across the intercooler (inlet temperature - outlet temperature). For this testing and data presentation, the measurement was taken at the end of each pull (~100mph WOT). The end of the pull was chosen as it generally represents the highest load on the charge cooling system. The charge cooling system has two parts, the intercooler and heat exchanger. The data shows that by implementing the Dinan heat exchanger, with the OEM intercooler, the charge cooling system pulls more heat from the intake air (lower IAT's) and performance decays slower (longer time on track before cooldown required).
Features:
- Average of 8° reduction in IAT's with a maximum reduction of 15° over 15 successive WOT pulls
- Reduces the tendency to heat soak / go in to limp mode
- 48mm thick Dinan cooler vs. 27mm thick stock cooler
- 78% more cooling surface area and volume than stock
- 100% TIG welded and pressure tested
- Installation hardware included (inclusive of xDrive specific transmission oil cooler brackets)
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
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★★★★★ 5
Fast Delivery
Style: Ink
Fast delivery. Easy to install.
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Reviewed in the United States on April 12, 2026
★★★★★ 5
Our Standard Cartridges.
Style: Ink
These cartridges are the only ones that work for our Epson printer. in the past, I have tried 3rd party units with various degrees of success. Sometimes they will work and sometimes not. They are less expensive up front but, in the long run, I am going to stick with the genuine Epson product. They are the same price everywhere that I have shopped, so we purchase them from Amazon because of the free shipping. The Epson cartridges just work in our printer.
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Reviewed in the United States on January 4, 2026
★★★★★ 5
Bright, Dependable, and Jam-Free — Excellent Printer Paper!
Size: 1 Ream | 500 Sheets, Style: Letter (8.5x11)
The Amazon Basics Multipurpose Copy Printer Paper is a dependable and high-quality choice for all the daily printing needs, offering a bright white finish that makes text and images look sharp and professional. It feeds smoothly through the printer without any jams or misfeeds, which is essential for maintaining productivity throughout the day. The 20 lb weight feels sturdy and durable, making it perfect for everything from internal memos to important client documents. A great value-for-money purchase that provides consistent results every single time.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
A Reliable Office Essential That Keeps Our Body Shop Running Smoothly
Size: 10 Reams | 5000 Sheets, Style: Letter (8.5x11)
In a busy auto body shop, we print a lot of paperwork every single day. Between repair estimates, insurance documents, invoices, work orders, and customer paperwork, having a dependable supply of printer paper is a necessity. Amazon Basics Multipurpose Copy Printer Paper has become one of those products that we always make sure to keep in stock.
The quality has been excellent for our everyday office needs. It feeds through our printers smoothly, produces clean, sharp documents, and we haven't experienced the jams or inconsistent performance that can sometimes come with lower-quality paper. Whether we're printing simple forms or detailed estimates, it gets the job done.
Another reason we continue to purchase it is the value. Running a business means paying attention to operating costs, and this paper offers a great balance between affordability and quality. We go through a large volume of paper, so being able to save money without sacrificing performance is a huge advantage.
I also appreciate the convenience of ordering it through Amazon. Instead of making extra trips to the office supply store, we can have it delivered directly to the shop and know that we'll always have enough on hand when we need it.
Overall, this has become our go-to copy paper for our business. It's dependable, high quality, and priced competitively. For any busy office, repair shop, or business that prints a large amount of paperwork, I think this is an excellent choice. We will definitely continue to purchase it and keep it stocked in our office.
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Reviewed in the United States on June 7, 2026
★★★★★ 5
Great paper good price
Size: 3 Reams | 1500 Sheets, Style: Letter (8.5x11)
This is a solid everyday paper option that does exactly what it’s supposed to do.
The packaging was good—everything arrived in perfect condition with no bent corners or damaged reams. It’s nice not having to deal with warped paper right out of the box.
Printing quality has been consistent. I’ve used it for both home and work printing, and it feeds smoothly through the printer without jams. The brightness is good too—text comes out clear and sharp, and colors look decent for standard copy paper.
Overall, it’s reliable, good quality paper at a fair price. I’d definitely buy it again.
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Reviewed in the United States on June 8, 2026