The panel below the IS's rear bumper is body-color from the factory. If you want it to gain shape and stay that color, this is the version to buy — for less than the carbon diffuser.
Same Feral Auto design, same mold, same lines as the carbon version. Built from FRP and shipped primed, ready for your painter to match your factory color code. It is an add-on, not a replacement: it mounts onto the factory rear diffuser, which stays on the car.
Pairs with the FRP Side Skirts and FRP Roof Spoiler across the same year range, and the 2026+ FRP Front Spoiler. All four FRP pieces come together in the FRP Aero Bundle Kit for the 2026-2027 IS350 F-Sport and F-Sport Design.
Fits the 2021-2025 Lexus IS300 and IS350 (Base and F-Sport) and the 2026-2027 IS350 F-Sport and F-Sport Design. It does not fit the IS500.
Why FRP
FRP is what most painted aero has been made from for decades, and it is the right answer when you want the shape in your car's own color rather than a carbon weave. It is strong, light, takes primer and paint evenly, and it is straightforward for a body shop to repair if it meets a curb — which is not true of carbon.
A rear diffuser is the lowest part at the back of the car and the most likely to catch a driveway ramp on the way out. Being repairable matters more here than almost anywhere else on the car.
Finish
Ships primed in gray, ready for paint. Photos show the parts painted gloss black. For a carbon weave finish, see the carbon fiber version, available in gloss, matte, Honey Comb and forged.
Browse all Feral Auto Lexus IS aero parts.
Free standard shipping on all orders delivered within the 48 contiguous United States.
In-stock parts are prepared for shipment within 1–3 business days. If a part is not currently in stock, the lead time shown under the Add to Cart button applies. Once a shipment leaves our facility, most orders arrive within 3–7 business days, and freight shipments within 5–10 business days.
We also ship to Alaska, Hawaii, U.S. territories, APO/FPO/DPO addresses and internationally by quote — contact us before ordering. Full details in our Shipping policy.
Returns require our approval. Contact us within 5 days of receiving your item to request one. Approved returns are subject to a 30% restocking fee plus return shipping, and original shipping is non-refundable.
Items that have been installed, used or modified cannot be returned. Non-standard carbon finishes are non-returnable once the order has been placed.
If we shipped the wrong part or it has a manufacturing defect, there is no fee and we cover return shipping. Damage in transit must be reported within 24 hours of delivery — see our Shipping policy. Carbon components carry a 6-month structural and finish warranty. Full details in our Refund policy.
