SKU: 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 weight for better handling and acceleration without compromising durability.
- Aerodynamic Design: Engineered to channel air effectively, increasing rear traction and high-speed stability used by race teams worldwide.
- Glossy Show Finish: Pre-coated clear coat resists chipping for a factory-like appearance straight from the box, no painting needed.
- Premium 3K 2×2 Twill Weave: Consistent pattern with optimal carbon-to-resin ratio delivers high stiffness and strength.
- Handcrafted Quality: Built by experts with 20+ years experience, each piece undergoes rigorous inspection for flawless fit and performance.
Product Notes
- Direct bolt-on replacement for OEM valance panel using factory mounting points.
- Clean with mild soap and microfiber cloth to maintain glossy finish.
- Secure packaging protects against shipping damage. inspect upon arrival.
Installation Notes
- Professional installation recommended.
- Remove factory valance and bumper liner. no modifications required.
- Uses OEM hardware and clips for secure mounting.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2020 | Subaru | WRX | Base |
| 2015-2020 | Subaru | WRX | Limited |
| 2015-2020 | Subaru | WRX | Premium |
| 2015-2020 | Subaru | WRX STI | Base |
| 2015 | Subaru | WRX STI | Launch Edition |
| 2015-2020 | Subaru | WRX STI | Limited |
| 2016 | Subaru | WRX STI | Series.HyperBlue |
| 2021 | Subaru | WRX | All |
| 2021 | Subaru | WRX STI | All |
Why Choose Seibon?
- Leader in carbon fiber since 2003 with products trusted by professional race teams.
- Every component features consistent weave and high-strength resin for race-proven durability.
- In-house design ensures precise fitment for Subaru WRX/STI applications.
Frequently Asked Questions
- Q: Will this fit my 2015-2021 Subaru WRX/STI?
A: Yes, RD-18SBIMP is direct-fit for all 2015-2021 WRX and STI trims on VA chassis using factory mounts. - Q: What type of carbon fiber is used?
A: Professional-grade 3K 2×2 twill weave carbon fabric with glossy clear coat for strength and shine. - Q: What is the warranty and install process?
A: Seibon offers structural warranty. bolt-on install takes 1-2 hours with basic tools, pro install advised.
Shipping & Handling
- Method: UPS or FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure foam-protected box, 48 x 20 x 8 inches
- Weight: 11 lbs product, 15 lbs shipping
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