Diffuser V1C+ – Honda Civic Si Coupe (FC3, 2017-2021)
Our rear diffuser for the Honda Civic Si Coupe (FC3, 2017–2021).
Made from 5052 aluminum and comes powder-coated satin black. Includes all hardware needed to install, however adjustments may be needed on individual cars to optimize drag reduction.
Important Order Info
Made to order — please allow 4–5 weeks for fulfillment. We will contact you to confirm details before shipment.
Key Features
Functional design: Unlike many diffusers that just trap air inside the bumper, our design gently leads air out from under the subframe to reduce drag.
Clears most exhausts: The folded aluminum construction was chosen to optimize strength, cost, heat resistance, and exhaust clearance.
Durable mounting: Steel braces and brackets are designed to be strong but flexible — if you manage to bend the diffuser, all you need to do is bend it back!