• Rear view of a Miata car featuring the installed Miata Diffuser '90-05 NA/NB from 9livesracing. The bumper is adorned with several racing stickers, including "NINE LIVES RACING" and NASA. Text at the top reads, "Miata Diffuser '90-05 NA/NB." The 9livesracing logo is also overlaid in the bottom right corner.
  • A rear view of a V8 Miata racing car features a "#9livesracing" bumper sticker and displays the Miata Diffuser '90-05 NA/NB from 9livesracing. Below are two smaller images emphasizing aerodynamics: one shows a computer simulation with airflow visualization, and the other depicts the car's underside with wind tunnel testing marks.
  • Close-up of the rear section of a vehicle, probably a car, highlighting the Miata Diffuser '90-05 NA/NB by 9livesracing with a small piece of crumpled white paper lodged in it. The background is out-of-focus, featuring people and some equipment.
  • A close-up view shows a Miata Diffuser '90-05 NA/NB by 9livesracing being clamped in place with a tool. The diffuser is part of an assembly or structure, with a screw and some mechanical components visible in the background. There is a barcode sticker on the clamp.
  • A Miata Diffuser '90-05 NA/NB from 9livesracing, installed on a red and white race car with the number 96 on the door and an aluminum rear wing, is speeding on a track. The V8 Miata displays visible sponsor decals. The driver, partially visible through the window and wearing a helmet, adds to the dynamic scene as the blurred background emphasizes their motion.
  • A red and white race car, numbered 96, equipped with a V8 Miata engine and fitted with the Miata Diffuser '90-05 NA/NB from 9livesracing, is speeding on a racetrack. The car features prominent sponsors' logos and a large rear wing alongside its aluminum diffuser. The background shows the racetrack bordered by blue and white barriers and empty grandstands under a clear sky.
  • A red and black V8 Miata with number 96 on the door speeds along a race track, featuring a Miata Diffuser '90-05 NA/NB by 9livesracing for enhanced aerodynamics. The background is blurred, indicating motion, and shows racetrack facilities and surrounding landscape under a clear sky. The driver is seen wearing a helmet and racing gear.
  • A partially constructed aluminum ventilation unit with several connected panels rests on a perforated workbench. The background shows a red and white wall with various tools and equipment scattered. Electrical cords and other workshop items, including bits from a 9livesracing Miata Diffuser '90-05 NA/NB project, are visible on the floor.
  • A person is partially hidden behind a large, metallic Miata Diffuser '90-05 NA/NB from 9livesracing, holding it up with both hands. The workshop-like environment contains various tools, materials, and a partially visible wooden structure in the background. The aluminum Miata Diffuser '90-05 NA/NB indicates an ongoing car modification project.
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9livesracing

Miata Diffuser '90-05 NA/NB

Miata Diffuser '90-05 NA/NB

$2,154.60 USD
$2,154.60 USD
Sale Sold out
Shipping calculated at checkout.
Add Mounting plate?

We made a diffuser for our own car, a V8 miata built for lap records. We ran the diffuser in CFD and set it to kill.  We gave zero cares for OEM body limitations, as we only wanted the diffuser to work and win championships.

Now it's a well-tested piece that we know performs like a champ.  We were asked repeatedly to make another for sale: We refused. Then we had a tire fail at Daytona. It killed our diffuser. 

Since we had to make a new for ourselves, we've decided to offer them to you as well, but they're a special order item. You will have to make crazy cuts to your rear end, and it takes some fabrication skills to install. Because of this, diffusers are made to order and cannot be returned.



Diffusers measurements

  • Have .25" locating holes along each rib for easy mounting 
  • Optional bolt-in subframe plate.
  • 57" long,  35.5" wide, and 10" tall.  
  • Made from a mixture of 5052, 6061, and 3003 aluminum. 
  • Built-in CFD, tested on track.  


Pay attention to this:
The diffuser mounts to an optional plate as seen in pictures. The plate bolts to the bottom of your subframe and is secured to the diffuser with .25" rod. The rods will be included with the mounting plate.
Trunks will need to be cut, along with the factory tow hooks. They will not fit otherwise. 

 

Shipping. 
This is a very large item. Shipping will be charged when the item is ready to be shipped as it will go by freight. 

 

Warranty/Returns/Lead times

Click here for current shipping estimates for new orders. All items are built to order. 

Powder coat or vinyl "wáng skin" upgrades are strongly recommended. Otherwise, wings are shipped raw, and while aluminum does not corrode the same way ferrous metals do, your wing will get progressively uglier as it is exposed to the elements.

Wángs and Mega Wings are covered by the Wang Guarantee.  Splitters, Sturdy Boiis, and air dams, based upon the nature of the use (and proximity to the earth), carry no warranty and are non-refundable. If you bolt these items to the car you own 'em. 

*Open air testing numbers available at https://9livesracing.com/cfd-testing

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