--- product_id: 326072510 title: "2015-2021 Unpainted Gurney Flap Wickerbill for Subaru WRX STi Factory OEM Trunk Boot Lip Spoiler Wing Rear Trunk Spoiler Extension Add-on 2016 2017 2018 2019 2020" brand: "optimal co" price: "$42.36" currency: USD in_stock: false reviews_count: 5 url: https://www.desertcart.us/products/326072510-2015-2021-unpainted-gurney-flap-wickerbill-for-subaru-wrx-sti store_origin: US region: United States of America --- # 2015-2021 Subaru WRX STI fit Enhanced aerodynamics & downforce Peel & Stick easy install 2015-2021 Unpainted Gurney Flap Wickerbill for Subaru WRX STi Factory OEM Trunk Boot Lip Spoiler Wing Rear Trunk Spoiler Extension Add-on 2016 2017 2018 2019 2020 **Brand:** optimal co **Price:** $42.36 **Availability:** ❌ Out of Stock ## Summary > 🚀 Elevate your WRX STI’s performance and style—because your ride deserves the edge. ## Quick Answers - **What is this?** 2015-2021 Unpainted Gurney Flap Wickerbill for Subaru WRX STi Factory OEM Trunk Boot Lip Spoiler Wing Rear Trunk Spoiler Extension Add-on 2016 2017 2018 2019 2020 by optimal co - **How much does it cost?** $42.36 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/326072510-2015-2021-unpainted-gurney-flap-wickerbill-for-subaru-wrx-sti) ## Best For - optimal co enthusiasts ## Why This Product - Trusted optimal co brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Aerodynamic Edge:** Boost downforce and stability with a precision-engineered gurney flap that reduces drag. - • **Durable High-Impact ABS:** Built to endure all weather conditions while maintaining a sleek, aggressive look. - • **Customizable Style Upgrade:** Unpainted finish lets you personalize your spoiler to match your unique aesthetic. - • **Seamless OEM Compatibility:** Perfectly designed to extend your Subaru WRX STI factory spoiler without drilling or damage. - • **Effortless Peel & Stick Installation:** Upgrade your ride in minutes with automotive-grade adhesive—no tools, no hassle. ## Overview The Optimal Co Gurney Flap Wickerbill is a high-quality, unpainted rear trunk spoiler extension designed exclusively for 2015-2021 Subaru WRX STI factory spoilers. Crafted from durable high-impact ABS, it enhances aerodynamics by increasing downforce without added drag. Installation is quick and damage-free using automotive-grade double-sided adhesive tape, making it a perfect upgrade for enthusiasts seeking a sleek, factory-like finish and improved vehicle stability. ## Description A gurney flap is a small lip placed at the trailing edge of a wing, used to dramatically sharpen the exit angle of the airflow, thereby creating more downforce without the downside of drag that a car would have from a steeper wing angle. Most spoilers on the market requires you to drill holes into your trunk. One little mistake will ruin your vehicle, not to mention it is very time consuming. Our spoilers are designed for easy installation, quick Sunday morning project. The spoiler is attached using automotive grade double sided adhesive tape. To ensure the spoiler stays attached, we recommend the surface of the trunk is cleaned throroughly as it will help the spoiler to remain in place securely. After the spoiler has been installed, please refrain from washing your car for at least 3 days. This will help the adhesive tape to set in and cure.Specifications:- Condition: 100% Brand New- Fitment: for 2015-2021 Subaru OEM WRX STI factory spoiler. (spoiler not included)- Year: 2015-2021- Package includes: 1 Piece of rear trunk spoiler, 1 roll of adhesive tape- Finish: Unpainted- Material: High Impact ABS* Note:- Installation instruction is NOT included, professional installation is recommended if you are unsure of the installation process.- This is a non-OEM product- Compatible vehicles above for reference only Review: Review - Good product Review: Good quality - Very happy ## Features - ✅Compatible with Subaru OEM WRX STI 2015-2021 factory spoiler. Please note that this is an extension add on to the orignal factory spoiler. (spoiler not included) - ✅High-Quality Material: Crafted from premium materials, the spoiler offers excellent durability and long-lasting performance. It is built to withstand various weather conditions and maintain its shape and finish over time, ensuring a reliable and stylish addition to your vehicle. - ✅Easy Installation: The spoiler is designed for a hassle-free installation process, allowing enthusiasts to easily upgrade their vehicles. It comes with a automotive grade double sided adhesive tape, ensuring a seamless and secure fit. - ✅Enhanced Aerodynamics: The spoiler is designed to improve the vehicle's aerodynamics, providing increased stability and reduced drag. Its sleek and sporty design complements the car's overall appearance while optimizing performance on the road. - ✅Customized Look: The spoiler adds a touch of personalization to your vehicle, giving it a distinct and aggressive look. Its precise fit and attention to detail make it appear as if it was factory-installed, enhancing the overall aesthetic appeal of the car. ## Technical Specifications | Specification | Value | |---------------|-------| | Auto part position | Rear | | Installation type | Peel & Stick | | Automotive Fit Type | Vehicle Specific Fit | | UPC | 787794937834 | | Manufacturer | Optimal Co | | Package Dimensions | 118.36 x 15.24 x 6.6 cm; 590 g | | Item model number | SBWRXGF15 | | Manufacturer Part Number | VGTRNK15-21STI | | Item Weight | 590 g | ## Product Details - **Colour:** Unpainted - **Brand:** Optimal Co - **Exterior finish:** Ready To Paint - **Material:** Acrylonitrile Butadiene Styrene (ABS) - **Vehicle service type:** Car ## Images ![2015-2021 Unpainted Gurney Flap Wickerbill for Subaru WRX STi Factory OEM Trunk Boot Lip Spoiler Wing Rear Trunk Spoiler Extension Add-on 2016 2017 2018 2019 2020 - Image 1](https://m.media-amazon.com/images/I/61WwH1rHO0L.jpg) ![2015-2021 Unpainted Gurney Flap Wickerbill for Subaru WRX STi Factory OEM Trunk Boot Lip Spoiler Wing Rear Trunk Spoiler Extension Add-on 2016 2017 2018 2019 2020 - Image 2](https://m.media-amazon.com/images/I/51kW0XmE4oL.jpg) ![2015-2021 Unpainted Gurney Flap Wickerbill for Subaru WRX STi Factory OEM Trunk Boot Lip Spoiler Wing Rear Trunk Spoiler Extension Add-on 2016 2017 2018 2019 2020 - Image 3](https://m.media-amazon.com/images/I/61B3gBkbUIL.jpg) ![2015-2021 Unpainted Gurney Flap Wickerbill for Subaru WRX STi Factory OEM Trunk Boot Lip Spoiler Wing Rear Trunk Spoiler Extension Add-on 2016 2017 2018 2019 2020 - Image 4](https://m.media-amazon.com/images/I/51mNjWNQbDL.jpg) ![2015-2021 Unpainted Gurney Flap Wickerbill for Subaru WRX STi Factory OEM Trunk Boot Lip Spoiler Wing Rear Trunk Spoiler Extension Add-on 2016 2017 2018 2019 2020 - Image 5](https://m.media-amazon.com/images/I/41dK8ZpwYML.jpg) ## Questions & Answers **Q: Does this need to be painted or can it be used as is?** A: I used it like this **Q: Does it fit a 2021 wrx sti?** A: Yeah it does ! Just put a good amount of 3m tape on it, because the wind hits hard over. **Q: How long is the Gurney Flap** A: I'm not exactly sure but it fits on it. **Q: Would this fit on the 2022 wrx** A: I don't think so ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by R***N on 13 December 2025* Good product ### ⭐⭐⭐⭐⭐ Good quality *by A***R on 27 June 2025* Very happy ### ⭐⭐⭐⭐⭐ Perfect fit *by C***J on 10 July 2023* After paint matching this turned the whole spoiler into something else! It looks amazing! ## Frequently Bought Together - 2015-2021 Unpainted Gurney Flap Wickerbill for Subaru WRX STi Factory OEM Trunk Boot Lip Spoiler Wing Rear Trunk Spoiler Extension Add-on 2016 2017 2018 2019 2020 - PQY 2PCS Spoiler Wing Stabilizer Compatible with Subaru WRX STi Sedan 2015-2019 Spoiler Wing Stiffi Support Rally - HK5 ABS OE-Style Rear Trunk Lid Spoiler Wing Compatible with 2015-2021 Subaru WRX STI, 2016 2017 2018 2019 2020 (Painted Blue) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/326072510-2015-2021-unpainted-gurney-flap-wickerbill-for-subaru-wrx-sti](https://www.desertcart.us/products/326072510-2015-2021-unpainted-gurney-flap-wickerbill-for-subaru-wrx-sti) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-11-07*