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Ships within 48 hours · Estimated delivery Oct 11 - Oct 16
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Description
Maxton Design Street Pro Rear Diffuser BMW 4 Gran Coupe M440I G26PRODUCT DETAILS PRODUCT VERSION PRODUCT CODE COMPATIBLE FIT STREET PRO REAR DIFFUSER BMW 4 GRAN COUPE M440I G26 BM4G26MPACKGCCNC RS2B BMW 4 Gran Coupe M440i G26 2021 Maxton Design products will not only provide visual enhancement, but will also improve aerodynamics of your car by increasing downforce. We ensure perfect fitment of the product by 3D laser scanning every make and model that we design. Our parts are made of ABS plastic that is also
PRODUCT DETAILS
|
PRODUCT VERSION |
PRODUCT CODE |
COMPATIBLE FIT |
|
STREET PRO REAR DIFFUSER BMW 4 GRAN COUPE M440I G26 |
BMW 4 Gran Coupe M440i G26 2021 - |
Maxton Design products will not only provide visual enhancement, but will also improve aerodynamics of your car by increasing downforce. We ensure perfect fitment of the product by 3D laser scanning every make and model that we design.
Our parts are made of ABS plastic that is also primarily used in OEM parts throughout the automotive industry due to its impact, scratch resistance and shock absorbance characteristics. Give you car a new sharp look that will be the envy of all your friends and other drivers. Start your adventure with Maxton Design’s visual tuning that is second to none in unique design and quality.
PRODUCT FEATURES
- Racing Durability Central Rear Diffuser MADE OF ABS PLASTIC
- MOUNTING KIT
- MOUNTING MANUAL
- More durable material, 10 mm thick ABS plastic plate
- Able to withstand more impact and scratch damage
- Lack of metal elements prevents any corrosion of the part
- New design with stylish edge finish
- UV protective coating
- Resilient to weather elements, can withstand high and low temperatures
- Product is secured with the protective foil
- No painting necessary
- Products can be manufactured in the following options: 10 mm thick matte black, 10 mm thick matte black with red core,
- If you decide to color paint the part, primer must be used prior to the painting
- Parts are labeled confirming authenticity and quality of the product
We highly recommend installation of all our products with professional auto body shops experienced in installation of visual modifications.
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
4.7 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 1
Product is not as described
Color: Charcoal, Size: Queen (20'' x 30'')
Bought 6 of these because I believed the reviews and the product description.. I don’t think these are bamboo because they don’t stay cool. The appearance of them are great.. but that’s the only good quality and I can’t return them because I got rid of the boxes they came in. Won’t be buying anything else from this company
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Finally sleeping through the night without waking up drenched
I was dealing with night sweats almost every night. Waking up overheated, flipping my pillow over constantly, just uncomfortable and restless. It was starting to mess with my sleep in a real way.
Since switching to this cooling pillowcase (and pairing it with a cooling blanket), it’s been a completely different experience. I’m actually staying cool through the night and not waking up soaked or irritated.
The fabric feels cool to the touch right away and doesn’t trap heat like a regular pillowcase. It’s smooth, comfortable, and still feels good after washing. Not stiff or weird like some “cooling” materials can be.
Is it magic? No. But does it noticeably reduce overheating and help you sleep better? Absolutely.
If you run hot at night or deal with night sweats, this is one of those small upgrades that makes a big difference. I wish I had bought it sooner.
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Reviewed in the United States on March 19, 2026
★★★★★ 5
so far so good
I was surprised at this pair of pillow cases only because the material seemed impossible to be cooling - it's that weird polyester blend. So far I have not awoken feeling sweaty around my face and scalp. I don't recall what I originally paid but I think it is great value for money! If you are sensitive to out of the box smell, I washed mine first and it didn't impede on the efficacy of the cooling!
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Reviewed in the United States on April 28, 2026
★★★★★ 5
It’s like sleeping on a beach in San Vito lo Capo
Italian voice:
I’m a big meaty fella so I put off a lot of heat ya hear. These pillow cases have changed my life. One moment they’re hot and the next you flip them and you’re blasted with a blast of ice cool what it feels like to chew 5 gum feeling capeesh. I would reccomend these pillow cases to even my grandma. If ya wanta get a rest so good that it feels like ya been sleeping with the fishes get these pillow cases, they’re the real deal. Then stop at Pauline’s joint and grab a slice of pizza say Vinnie sent ya. Anyways I gotta go my wife’s cooking up a mean lasgna and we’re gonna watch the dodgers. Let me know how these treat ya I guarantee they will change your life. Vinnie out
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Reviewed in the United States on February 15, 2026
★★★★★ 4
Soft "cooling" case.
Yes it is very cool when you lay on it. It doesn't stay cold though. Within a minute or 2 to whatever your temp is.
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Reviewed in the United States on December 25, 2025
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