SKU: 3734344522

ECS Tuning Rear Diffuser - 8Y RS3

Sale price$211.92 Regular price$235.47
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Ships within 48 hours · Estimated delivery Aug 18 - Aug 23

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Description

ECS Tuning Rear Diffuser - 8Y RS32X Entries For Spring Spin To Win Sweepstakes Upgrade your exterior styling with the ECS Tuning Gloss Black Rear Diffuser. This diffuser was engineered and designed in house to add a more aggressive appearance to the rear of your 8Y RS3 that lends an OEM+ feel to the otherwise boring looking OEM diffuser. An exclusive design only available through ECS Tuning, this rear diffuser will be sure to catch attention and turn heads. The diffuser is crafted of

2X Entries For Spring Spin To Win Sweepstakes

Upgrade your exterior styling with the  ECS Tuning Gloss Black Rear Diffuser. This diffuser was engineered and designed in-house to add a more aggressive appearance to the rear of your 8Y RS3 that lends an OEM+ feel to the otherwise boring looking OEM diffuser. An exclusive design only available through ECS Tuning, this rear diffuser will be sure to catch attention and turn heads.

The diffuser is crafted of a UV stabilized ABS polymer to achieve it's deep high gloss shine and provides an aggressive and sporty style that's sure to set your vehicle apart from the rest. Features a dual oval outlet design to fit the factory and most aftermarket exhaust systems. Modeled to the unique styling of the 8Y RS3, this replacement piece adds uniqueness and aggressiveness with it's gloss black material and bladed styling characteristics it will add the perfect compliment to your 8Y RS3 rear bumper.

Installs with no drilling, cutting, or modification of any kind required. Simply remove your currently installed valance and install the diffuser using the factory mounting locations.  Make sure all tabs are lined up and lightly press the diffuser in place until the tabs click into position. 

Product Details

  • Designed and engineered in-house using state of the art 3D laser scanning and CAD technology for precision fitment 
  • Modeled to the unique styling of the 8Y RS3 adding uniqueness and sharpening aggressiveness
  • Compatible with the OEM and aftermarket exhausts
  • Mounts to OE clip locations and OE holes on the outer edges of the bumper with your OEM hardware
  • Made of a UV stabilized ABS polymer to achieve it's deep high gloss shine

Saloon Variants Only.

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: 3734344522

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4.1 ★★★★★
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The Inspector
Battle Creek, US
★★★★★ 5
HOLY CRAP!!!!
So my 2005 Durango has a 5.7 and I put on 253,000 miles on it before it blew a head gasket. Since it was summer, iI decided I'd tackle it myself. The upper end was so full of gunk, I can't believe I hadn't had serious issues. Anyway, I apparently dropped some pieces of crud down the oil channels, 'cuz after putting it all back together, I got alarms for low oil pressure. Figuring I'd try anything else before replacing the oil pump, i gave this stuff a try. WOW!!!! Not only did the oil pressure return, the engine runs SO much smoother! I had forgotten how smooth it ran when it was new. The caveat is that apparently the gunk was the only thing keeping some areas from leaking - as it lost oil at a startling rate. 1 bottle of the Liqui Oil Saver though, and within a week the oil leaks completely stopped.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 8, 2025
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Marlana Lupo
Port Orchard, US
★★★★★ 5
Awesome!!
Had a check engine light come on for cam shaft position. Did some research online about the specific code and found that I could be due to sludge in the engine. Added this and ran for about 30 minutes and then had the oil changed. The light never came back on and the engine is running smooth and quiet. Will definitely use again.
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Reviewed in the United States on April 5, 2026
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Discovery
New York, US
★★★★★ 5
Great product
This brand is great. The car is running great
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Reviewed in the United States on March 4, 2026
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Wguinn
Bozeman, US
★★★★★ 5
Well worth the money.
I use nothing but Wix filters; they are the best
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Reviewed in the United States on April 22, 2026
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José hernandez
West Palm Beach, US
★★★★★ 5
Excelente
Excelente
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Reviewed in the United States on April 23, 2026

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