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Rear Under Spoiler and Diffuser System for 2012-2016.5 Tesla Model S
Rear Under Spoiler and Diffuser System for 2012-2016.5 Tesla Model S
$1,995.00

Rear Under Spoiler and Diffuser System for 2012-2016.5 Tesla Model S

$1,995.00

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This product has been discontinued. Please refer to the other 2012-2016.5 Tesla Model S Exterior upgrades here!

The performance and aerodynamics of a car are often best visible at the rear and this Rear Under Spoiler/Diffuser system lets people know that your Model S is a serious performance car.

The design is a mix of functional aggressiveness and it takes Tesla’s factory rear diffuser design to a new level. The subtle elongation of the rear diffuser enhances the air diffuser effect Tesla has already designed into the car. All five of Tesla’s functional underbody diffuser fins are kept intact and well integrated into the new design.

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Include Diffuser Fins?

UP-MS-105-3.1

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SKU: UP-MS-105-1.1
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Product Details Product Details

The performance and aerodynamics of a car are often best visible at the rear and this Rear Under Spoiler/Diffuser system lets people know that your Model S is a serious performance car.

The design is a mix of functional aggressiveness and it takes Tesla’s factory rear diffuser design to a new level. The subtle elongation of the rear diffuser enhances the air diffuser effect Tesla has already designed into the car. All five of Tesla’s functional underbody diffuser fins are kept intact and well integrated into the new design.

Available without the fin panel for a subtler look, or choose the fin panel option for a more aggressive aesthetic.

This part is offered in the following finishes: unpainted, premium factory color paint, or in beautiful carbon fiber. The Unplugged Performance Rear Under Spoiler and Diffuser System is designed and produced to the highest quality levels in Hawthorne, California.

Starting September 2015: All rear under spoiler/diffuser systems in either unpainted or painted variations are produced in a Tesla factory style of impact resistant urethane. This production method allows significant durability as the material rebounds to the factory shape after experiencing an impact. The carbon fiber option remains as carbon fiber for those looking for supercar grade lightweight construction.

Compatible with all Model S variants produced before Spring 2016.

Tesla’s production of the Model S utilizes many ongoing minor adjustments which occur often without public announcement and without following a traditional model year cycle. As a result of our experience, we produce multiple variations of our parts to ensure a best fitment match Tesla’s many publically undocumented variations. For our research and development to benefit your order please provide us with the production month/year, trim specs, color, and VIN when you submit your order.

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      WHAT OUR CUSTOMERS SAY

      RATED 4.97 (301 REVIEWS)
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      With real reviews from real customers, shop UP products for your Tesla Model S, 3, X, Y and Cybertruck with confidence. Leave reviews and earn up to 2000 UP Rewards points each, redeemable towards exclusive UP Products.

      SUBLIME... best description not only does this make your Y look HOT, it make bumps better! Quicker recovery, firmer turns, everything is better! and Blake is the best advisor out there. Pays attention, follows up and ensures everything is working as expected from delivery to install. Great team!!!
      forthestores June 27, 2023
      Been waiting for this part from UP since purchasing my coilovers almost 2 years ago and just perfect timing that old links are completely shot and this totally changed the overall feel of the car and reduced tension. Customer service is excellent and will be doing next upgrades with UP
      jdl21292 April 10, 2023
      Robust carbon steel construction. Lines look very clean with the HD front and rear bumper installed. Have not seen a cleaner looking aftermarket rock slider for the CT, love mine!
      Megatron November 19, 2025
      These are exactly what I was expecting. I waited over a year for them. Pandemic backorders and all. It took me about 6 hours to install with help from a friend. The fronts were the worst part. You have to have the spring compressors mounted just right and really compress them a lot to assemble the...
      Tim H. January 05, 2023
      Very nice shirt that allows me to represent the best in Tesla aftermarket. Pleasure doing business and I look forward to working with UP forever.
      Christian N. January 01, 2026
      I ordered my satin graphite UP x BBS Flugplatz wheels in March 2022 and got them delivered and installed in June 2022. The wheels were ceramic coated after delivery. I am running 255/35 Falken tires (all-seasons). These wheels have an amazing design and paint finish. They do a great job at exposing...
      Kyle R. November 03, 2022
      Absolutely love it. Compliments on it all the time. I've had people compare the look to a Porsche or even a McLaren. Beyond the good looks, it also gave me some better front downforce. I often take my car to the track and some hard canyon runs so the functionality of it was pretty important to me.
      Andrew P. September 16, 2022
      Dominic Marcu - Racing Driver perfect! with their help I can have the desired setup for the competition car.
      Dominic M. April 12, 2023
      These dual rate springs were the most noticeable and effective upgrade I've made to my Model Y. Much better handling and comfort compared to the stock standard rate springs.
      davidseldenbrooke March 02, 2023
      Edgar August 28, 2023
      I got this installed about 2 years ago and everything is perfect! This really makes my car's interior complete instead of having a plastic headliner. Every time another Model 3 owner looks inside my car, that is definitely the first thing they noticed. Also the guys who worked on my car were super...
      aranetasteven December 15, 2022
      Coupled with the FUCAs, the rear arms really help do a proper alignment. Definitely get these if you want to get a perfect alignment for your car, and better than OEM. I put -2 camber in the rear for my track day yesterday and achieved phenomenal handling in the corners. I also tried it out in drift...
      Sof October 18, 2022
      Excellent product! I installed mine as my first step into getting some more performance out of my M3P for Autocross. The front and rear sway bars along with some wider wheels and stickier tires really took my lap times to the next level. I would say, if you drive hard with these sway bars like I...
      sean4528 January 03, 2023
      After lowering my Model 3 on coilovers I was having all kinds of clunking noises come from the front sway bars links. Initially, I purchased a different brand of adjustable links and they clunked no matter what I did (shortening, lengthening, removal and re-torqued them countless times), so I...
      dustinalderfer86 May 31, 2023
      Purchased these to dial in my rear alignment, went through so many rear tires glad to be back into spec. I had a tire blow out on the freeway with my family because I didn't notice the inside of the tire had worn down so much in just 4k miles! These rear-toe arms would have avoided that ordeal.
      Jorge (. August 23, 2022
      In looking for rims for a car the first thing I think of is uniqueness. That’s what drew me to this stylish set. I feel like im the only one in LA with a ste let alone 22’s on a Y and they fit and ride flawlessly. Definitely would suggest getting a pair if you want to stand out. I see they got...
      Montage Ø. November 03, 2025
      After using the fascia for over two years, this feels like a must-have Tesla upgrade. The stock Model 3 just doesn’t look the same anymore. I rate 4/5 stars since epoxy would be better than double-sided tape to secure the ultrasonic sensors.
      David S. November 06, 2022
      These are absolutely THE BEST brakes (https://www.instagram.com/p/CveWNmjvKwT/) They work flawlessly lap after lap with it's nonstop stopping power, they will last forever. Incredible value for money and Highly recommend to anyone considering using their Tesla for both track and street.
      f1dinesh August 15, 2023
      Installed this on my CyberBeast in my own garage. The instructions provided were top notch with outstanding attention to detail. I installed the bar in the middle position. On the first turn I noticed the decrease in body roll. The turn in and mid turn stability is much improved. I am very...
      nitrous87 June 17, 2025
      I loved upgrading my front brakes to BFB Carbon, after a few track days and realized I want the rear as well, plus now the aesthetics are on point! (look weird with only the front carbon IMO)
      Jorge (. August 23, 2022
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      Unplugged Performance is the world leader in premium performance upgrades for Tesla vehicles. With our USA-made line of stylish and high-performance parts, our sole focus is on holistic development and improvement of all Tesla cars.
      Unplugged Performance was founded and incubated by the team behind the world-renowned automotive customizer Bulletproof Automotive. Unplugged Performance is the world's leading company focused on the customization and sports performance of Tesla Motors vehicles.
      All of our parts are researched and engineered on our own development vehicles with the intention of improving every aspect of the driving and ownership experience. Unplugged produces an exclusive range of premium upgrades to give a new sporty performance identity to Tesla Model S, Model X, Model 3, Model Y, and the Cybertruck.
      Improving on perfection is no easy task, and to do so Unplugged products are professionally designed, prototyped, and manufactured in-house in Hawthorne, CA, and in collaboration with the best motorsports suppliers. The supercar performance of Tesla vehicles meets supercar-grade enhancements with Unplugged Performance.
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