Skip to content

Seibon 18-20 Subaru WRX / STI Carbon Fiber Rear Diffuser

Marsoni M251S
Sale price$858.48
Pay 4 payments of $214.62 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Seibon 18-20 Subaru WRX / STI Carbon Fiber Rear DiffuserSKU: RD18SBIMP UPC: 887753487704 Seibon 2015 2021 Subaru WRX STI Carbon Fiber Rear Diffuser Transform the rear end of your 2015 2021 Subaru WRX or STI with the Seibon Carbon RD 18SBIMP rear diffuser. This direct fit component replaces the factory valance for improved downforce and ground effects. Handcrafted from premium carbon fiber, it reduces weight while enhancing stability at high speeds. Key Features Lightweight Construction: Reduces vehicle
Easy Shipping

Quick Dispatch:

Your Seibon 18-20 Subaru WRX / STI Carbon Fiber Rear Diffuser orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your Seibon 18-20 Subaru WRX / STI Carbon Fiber Rear Diffuser ships.

Need Help?
Questions about Seibon 18-20 Subaru WRX / STI Carbon Fiber Rear Diffuser, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for Seibon 18-20 Subaru WRX / STI Carbon Fiber Rear Diffuser in your area.

Get Shipping Estimates

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
4.3 ★★★★★
Based on 315 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
M
Verified Purchase
Mickey Ryder
Louisville, US
★★★★★ 5
Awesome!
Color: White and Black, Size: 15.7"
Nice sturdy shelves. Looks awesome on my walls.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
N
Verified Purchase
norton
West Palm Beach, US
★★★★★ 5
Great for knick-knacks and toiletry items
Color: Dark Brown, Size: 15.7"
Perfect for the bathroom. I love that you can position the shelves in different arrangements. Sturdy enough for knick-knacks and toiletry items. Looks exactly as pictured.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
M
Verified Purchase
Matt
Pawtucket, US
★★★★★ 4
Shelf
Color: Black and Gold, Size: 15.7"
Some holes are not pre drilled, over all easy to assemble. Looks good on wall and surprisingly sturdy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 7, 2026
R
Verified Purchase
Rhart
Lowell, US
★★★★★ 5
Easy to install
Color: Black, Size: 15.7"
This made my bathroom look a lot better. Its easy to assemble. Its sturdy enought to hold a lot of things.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 10, 2026
T
Verified Purchase
Teresa
Carnegie, US
★★★★★ 5
Buy These
Color: Black, Size: 15.7"
Love these shelves! Great quality and design. I have them in two different colors two different bathrooms. Adds the perfect touch of design.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026

recommand products