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Description
Dinantronics X - 2015-2020 BMW M3C / M4CThe DINANTRONICS X is the newest installment of the highly successful Dinan foray into inline tuning modules. Like its predecessors it is a highly engineered piece of computer hardware and software that enhances engine performance to levels the stock programming is not allowed to venture. It does this without affecting long term reliability or the functionality of on board diagnostic systems when run under recommended operating variables. Unlike its
The DINANTRONICS X is the newest installment of the highly successful Dinan foray into inline tuning modules. Like its predecessors it is a highly engineered piece of computer hardware and software that enhances engine performance to levels the stock programming is not allowed to venture. It does this without affecting long term reliability or the functionality of on-board diagnostic systems when run under recommended operating variables. Unlike its predecessor however, the DINANTRONICS X is Bluetooth smart and offers convenient access to the adjustment of power levels directly from the palm of your hand.
A further advancement beyond its entry level little brother, the DINANTRONICS SPORT, X connects to additional inputs and/or has a more refined tuning strategy that yields more power as a result. For those that do not wish to (or can't) alter their stock ECU with a more robust engine flash the DINANTRONICS X is a perfect alternative to satiate the craving for "more". Whichever level of engine tuning is ultimately chosen you can be sure to be pleased by the result. The Dinan Difference is possible by employing a full staff of talented engineers that are well rounded in many facets of automotive engineering and backed by a wealth of hands-on knowledge. Stemming from diverse backgrounds not only on racing teams but on standard factory production line vehicles, we have seen it all. Manipulating these signals/maps with an adept hand, all the while keeping an engine running at its best and with the most reliable power, is what Dinan is all about.
Download Installation Guide
NOTE(S): (1) Please refer to the recommended mapping notice below for important operating information. (2) D440-0137 is specific to the F8x M3/M4 equipped with the Competition Package. If you have a base vehicle please use SKU D440-0128.
Features:
- More Power: Max gains of up to +69 HP and +81 lb-ft TRQ (Crank); +62 HP and +73 lb-ft TRQ (Wheel) on base models.
- Bluetooth smart (Android and iOS Compatible). App download / pairing process detailed within the installation instructions located under the Tech Resources dropdown below.
- 7 power levels and a bypass setting to choose from.
- Smooth and predictable power delivery.
- On board diagnostics and factory safeguards maintained.
- Unaffected by dealer factory updates.
- Plug and play installation.
- 14 day satisfaction guarantee.
- 1 year limited warranty.
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
4.1 ★★★★★
Based on 545 reviews
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Product Reviews
★★★★★ 4
As promised
Color: Dark Gray Seersucker, Size: Queen(90"x90")
Cooling as advertised. Only complaint is that most nights it slides off the bed because it is so silky.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Lightweight and soft
Color: Navy Blue Seersucker, Size: King(108"x90")
I purchased this as someone who is constantly waking up too hot with blankets, but too cold without. This comforter has been a game changer. I’m getting much better sleep, and while I still wake up a little too warm sometimes, it’s significantly less than I was previously.
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Reviewed in the United States on April 22, 2026
★★★★★ 5
ightweight Cooling Comforter That Actually Feels Good for Hot Nights
This seersucker cooling comforter has been a nice upgrade for warmer nights. It’s very lightweight and breathable, so it doesn’t feel heavy or trapping heat like a traditional comforter. The fabric has a soft, slightly silky feel, and the seersucker texture gives it a bit of airflow that helps it stay more comfortable.
The fit is good on a Twin size bed with enough drape over the sides without feeling oversized or bulky. It lays nicely on the bed and doesn’t bunch up easily, which makes it easy to straighten out in the morning.
Thickness-wise, it’s on the thinner side, which is actually what makes it work for hot sleepers. It’s not meant to be a heavy blanket and more of a light, breathable layer that still feels like a comforter. The reversible design is a nice touch too depending on which side you prefer.
Overall, it’s easy to use, lightweight, and comfortable for summer or warm sleepers. It feels like good value if you want something simple that helps cut down on overheating without overcomplicating things.
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Cooling Blanket for Hot Sleepers, Soft Lightweight Comfort with a Cool-to-the-Touch Feel
This reversible cooling blanket is a great option for anyone who sleeps warm. It’s incredibly soft, very lightweight, and has that instantly cool-to-the-touch feel that makes it especially comfortable for hot sleepers.
What I liked most is how airy and breathable it feels without being heavy or stuffy. It’s comfortable enough to use all night and gives that nice cooling sensation when you first pull it over you. The softness also makes it feel cozy without sacrificing the lightweight design.
My only real wish is that it came with a matching pillowcase, because that would make it feel even more complete as a sleep set.
Pros:
Extremely soft and comfortable
Cool to the touch
Lightweight and airy feel
Great for hot sleepers
Breathable without feeling heavy
Cons:
Does not include a matching pillowcase
Verdict:
If you tend to sleep hot, this is a really nice lightweight cooling blanket. It’s soft, breathable, and comfortable with a refreshing cool feel. I just wish it included a pillowcase to make the set feel complete
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Reviewed in the United States on April 4, 2026
★★★★★ 4
Cool & comfy
Color: Dark Gray Seersucker, Size: King(108"x90")
Cool but not as cold as I wanted
Very soft and comfy though
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Reviewed in the United States on April 29, 2026