SKU: 15414976004

BMW M3/M4 RHT CC1 Style Rear Diffuser

Sale price$970.62 Regular price$1078.47
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Ships within 48 hours · Estimated delivery Aug 4 - Aug 9

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Description

BMW M3/M4 RHT CC1 Style Rear DiffuserEnhance the rear profile of the M3 with this stylish carbon fiber rear diffuser. Designed to complement the cars sporty character, it adds a distinctive and aggressive look to the rear end. Handcrafted from premium prepreg carbon fiber, this diffuser offers a flawless fit and a refined finish. Its design integrates seamlessly, elevating the overall aesthetics of the M3 while reflecting the highest standards of craftsmanship. Material Types FRP FRP,

Enhance the rear profile of the M3 with this stylish carbon fiber rear diffuser. Designed to complement the car’s sporty character, it adds a distinctive and aggressive look to the rear end.

Handcrafted from premium prepreg carbon fiber, this diffuser offers a flawless fit and a refined finish. Its design integrates seamlessly, elevating the overall aesthetics of the M3 while reflecting the highest standards of craftsmanship.

Material Types

FRP

FRP, with a Primed Black, Grey, or White Finish
*FRP(Fibre Reinforced Polymer) is a composite crafted from carbon fibre and reinforced polymers. When selecting the FRP option, it arrives with a primed finish, intended for professional preparation and painting. It’s essential to have the FRP professionally installed to ensure optimal results. Please be aware that any markings or pockmarks are inherent characteristics of resin within the FRP and are not indications of product defects Please note: As every vehicle manufacturer works with tolerances and FRP parts can warp, slight adjustments may be necessary.

CFRP

CFRP, which stands for Carbon Fiber Reinforced Polymer (otherwise known as wet-carbon). This is a type of material that combines carbon fibre with a polymer (think of it as a sort of glue) to bind the fibres together. The polymer gives the carbon fibre its shape and durability, making CFRP an incredibly strong yet lightweight material. It’s used in a variety of products and industries, from automotive parts to sports equipment, because of its high strength-to-weight ratio.

Dry Carbon

The term “dry carbon” might be a bit misleading because it doesn’t mean the material is literally dry. Instead, it refers to the method used to make the carbon fibre parts. Dry carbon fibre is made by using a pre-preg (pre-impregnated) method where the carbon fibre is impregnated with resin before it’s molded. Then, it’s cured in an autoclave (a high-pressure oven) which makes the parts extremely lightweight and strong. Dry carbon fibre is often considered a more premium option because of its superior strength and lighter weight compared to CFRP, but it also tends to be more expensive.

So, what does this mean for you? Unless specifically stated, all the carbon fibre parts we sell are CFRP. We choose CFRP for its fantastic balance of strength, durability, and cost-effectiveness, ensuring you get high-quality parts without breaking the bank. However, we also understand the unique benefits of dry carbon fibre, especially for those seeking the ultimate in performance and weight reduction. For these select items, we’ll make sure it’s clearly stated in the product description or title.

Material Characteristics

1. FRP (Fiber Reinforced Polymer):

Characteristics:FRP parts are made from a combination of fibers (like glass) and a polymer matrix (usually a resin). This composition can exhibit certain traits intrinsic to the nature of the materials.
Fitment: It’s not uncommon for FRP parts to require adjustments for perfect alignment. The parts might come with sanding lines or filler marks; however, these are not product defects but rather characteristics of the resin and the production process.
Finishing: A professional body shop can easily address and rectify the mentioned traits, ensuring the part looks and fits as intended.

2. Wet Carbon (or Wet Lay Carbon Fiber):

Characteristics: Wet carbon is made by laying down carbon fiber and then impregnating it with resin. It gives a beautiful, deep weave pattern that’s aesthetically pleasing. However, the nature of the process can sometimes result in small pinholes or slight variations in weave patterns. Again, these aren’t defects but characteristics inherent to the wet lay process.
Finish: Wet carbon parts often come with a glossy finish, but might benefit from an additional coat of clear lacquer to enhance the depth and protect the weave.
Care: While it might be tempting to apply Paint Protection Film (PPF) to preserve the beauty of the weave, it’s advised to wait before applying PPF. Immediate application can lead to issues like peeling off the lacquer.

3. Dry Carbon (or Pre-preg Carbon Fiber):

Characteristics: Dry carbon is the pinnacle of carbon fiber technology, offering superior strength, lightness, and a premium finish. The material is pre-impregnated with resin, ensuring consistent distribution and quality.
Finish: Products made from dry carbon exhibit an OEM-like finish, ensuring the part seamlessly integrates with the vehicle’s design.
Quality: The meticulous manufacturing process and superior raw materials ensure that dry carbon products often have the most precise fitment and highest durability among carbon fiber parts.

4. PP (Polypropylene)

Characteristics: Polypropylene is a thermoplastic polymer known for its outstanding chemical resistance, elasticity, and thermal insulation properties. It is less dense than other plastics, making it a lightweight option for car body kits. PP is resistant to various chemical solvents, bases, and acids.
Fitment: PP body kits are typically easier to install due to their flexibility, which allows for better adjustment and alignment to the car’s body. This flexibility also makes PP parts more resistant to cracking and breaking upon impact.
Finishing: PP can be painted or treated with a variety of finishes to enhance its appearance or to match the vehicle’s existing color scheme. However, proper surface treatment is crucial as the material is naturally hydrophobic and may not bond well with some paints without proper preparation
Care: Due to its chemical resistance, cleaning and maintaining PP body kits is relatively straightforward. They can withstand a wide range of cleaning products without damage. Regular washing and occasional waxing are sufficient to maintain the appearance and integrity of the part.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 15414976004

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4.0 ★★★★★
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Verified Purchase
Morstead
West Palm Beach, US
★★★★★ 5
Comfortable & well-fitting, but some differences in stiffness between batches
Size: Medium, Color: Black/Deep Blue/Deep Grey/Heather Grey
I've basically been exclusively buying these since I've discovered them. Super-comfortable and maintain their shape for a long time, but I've noticed from buying it multiple times that sometimes the pouch area has stiffer texture and more support than other times (when it's loose & stretchy like the rest of it). I wish I could specify receiving the more-supported ones because they tend to produce less....how to say, knocking the boys around.
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Reviewed in the United States on March 22, 2026
E
Verified Purchase
EclecticJay
New York, US
★★★★★ 5
Comfort and softness
Size: 3X-Large, Color: Black/Navy/Dark Grey/Red
True to size; they are comfortable, good quality, and really soft.
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Reviewed in the United States on January 3, 2026
J
Verified Purchase
James
Cuba, US
★★★★★ 5
Look great, feel great
Size: Large, Color: Black
These feel great and fit well. With most briefs I tend to the trouble either keeping the front in or not having the back cover everything but these do both things and are very soft. They also look great, even on body types not in the promo picture. They are a great set of briefs and have held up so far and I got mine a little around a year ago and wear them often.
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Reviewed in the United States on September 26, 2025
G
Verified Purchase
garlic brad
Cuba, US
★★★★★ 4
Comfortable, but run big
Size: Small, Color: Red/Orange/Yellow/Blue
I'm a small guy and I purchased size small. The underwear are not bad. Great if you're a bigger guy or if you have a really big butt. If you're on the smaller side or skinnier though they'll fit a little loose. My butt is pretty big, but it doesn't fill out the back completely. Very comfortable though and the waist fits fine. Just a big backside. They don't ride up and so far they're durable. No fading in color and the material holds strong after many wears and washes.
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Reviewed in the United States on February 24, 2026
S
Verified Purchase
shaik
San Leandro, US
★★★★★ 5
Value. Fabric quality.
Size: Large, Color: Black/Navy/Dark Grey/Red
Better than I expected. Great fabric. Perfect fit. This is the most satisfying buy that I ever did. For this price!
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Reviewed in the United States on February 14, 2026

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