S-FLO 4” Coupler: The S-FLO 4” Coupler transitions from 4.5” to 4” to accommodate aftermarket turbo inlet pipes that are 4” in diameter.
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2020,2022-2026 | Audi | RS3 | Base |
| 2018-2022 | Audi | TT RS Quattro | Base |