Duraflex Fiberglass R1 Rear Diffuser (Unpainted) - Duraflex 115957

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Duraflex Parts & Accessories
  • Duraflex Fiberglass R1 Rear Diffuser (Unpainted) - Duraflex 115957

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  • Part#: 115957
  • Original Price: $302.00
  • Our Price: $221.99
  • 1 In Stock - Ships in 1-2 days
  • Shipping: $95.00

Duraflex Rear Diffuser

Rear Diffuser by Duraflex. Accelerate the velocity of the airflow underneath your car with this Rear Diffuser. At speed, it'll decrease the pressure under the car with a resulting increase in downforce. Increased downforce will help improve your tires' grip and make your car handle better.


  • Helps to elevate your vehicle above the masses
  • Proprietary polymer blend for maximum flexibility and strength
  • Brings the ultimate in style and performance
  • Provides unbeatable durability and long-lasting service life

When you spend big money for a body kit, installation and paint, you have high expectations. You absolutely expect your vehicle to look great, but you also want that look to last. In order to get lasting good looks you have to start with a high-end quality Duraflex body kit. Duraflex combines fiberglass, plastic and flex resins to manufacture unique parts that are stronger than regular fiberglass, which means that they will flex instead of crack and bend instead of break. Since Duraflex parts are more flexible compared to standard fiberglass components, they not only last longer, but also allow for much easier installation.

You won't realize the full benefits of Duraflex body kits though, until you drive your vehicle. You'll enjoy the looks you get when everyone sees those smooth Duraflex curves, but you'll really love how durable your Duraflex panels are when backing out of a driveway or tapping a curb. You will also benefit from the materials unbeatable resistance to weather and chemical corrosion, which results in longer service life, ensuring your vehicle will look stunning for years to come. Give your valuable investment the style it deserves with the Duraflex body kit!

California Residents: Prop 65 WARNING

Duraflex Fiberglass R1 Rear Diffuser (Unpainted) 115957 is available for the following vehicles:

Please click on next to the vehicle for specific year information.
Year range Make Model Doors Notes
2008-2013 BMW 1 Series 2 Door
  • Fits Only M Sport Rear Bumper
  • w/ Single Exhaust
If this Duraflex Rear Diffuser is not exactly what you are looking for to accessorize your 2008-2013 BMW 1 Series, please don't give up just yet. Our catalog has huge selection of parts and accessories for your BMW 1 Series.

Returns Policy:

We want all customers to know that there will always be sanding, shaving, cutting, and/or filling prior to installing body parts. Also, the black primer finish must be sanded and other prep work will be required prior to painting.

Our customer guarantee is:

  • You can return your item within 30 days of receipt for any reason as long as it is returned in the original packaging and you pay for all shipping.
  • Original shipping fees are non-refundable.
  • 20% retocking fee applies to all returns.
  • Products are non-refundable if altered in any way.
  • It is recommended that the part be installed by a professional body shop that has experience working with aftermarket fiberglass and urethane body kits including but not limited to sanding, shaving, cutting and filling.
  • Surface cracks in fiberglass are not considered product defect, they can be treated during the paint process.
  • Sometimes your body shop needs to 
  • Extra fees may be incurred for proper fitment.
  • Refunds will not be issued due to fitment issues.
  • Displayed vehicles are modified by professionals and they may look different than the part you will receive. Refer to individual part image (If available) to know what to expect.


Material: FRP (Fiberglass Reinforced Plastics)
Qty Sold: 1 Piece
Style: R1
Type: Rear Lip/Add On