CSF's all-aluminum filler neck replaces the weak plastic auxiliary filler neck on the FR-S, BRZ, 86 and GR86. It's 100% TIG-welded and mirror polished, and ships with a 1.4 bar high-pressure mini-style radiator cap embossed with the CSF logo. An integrated 1/8 NPT sensor port with a preinstalled plug lets you add an aftermarket sensor, and the whole unit is a drop-in replacement that installs in under five minutes with no modifications.
| Type | Aluminum auxiliary filler neck with radiator cap |
| Material | All-aluminum, 100% TIG-welded |
| Radiator Cap | 1.4 bar high-pressure mini-style cap (CSF) |
| Finish | Mirror polished |
| Fit | Drop-in, no modifications |
| Included | 1/8 NPT sensor port with preinstalled plug |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2013-2016 | Scion | FR-S | Base |
| 2013-2020,2022-2025 | Subaru | BRZ | Limited |
| 2013-2019,2022-2025 | Subaru | BRZ | Premium |
| 2015 | Subaru | BRZ | Series.Blue |
| 2019 | Subaru | BRZ | Series.Gray |
| 2016 | Subaru | BRZ | Series.HyperBlue |
| 2017 | Subaru | BRZ | Series.Yellow |
| 2018,2020,2024-2025 | Subaru | BRZ | TS |
| 2017-2020 | Toyota | 86 | Base |
| 2018-2020 | Toyota | 86 | GT |
| 2020 | Toyota | 86 | Hakone Edition |
| 2017 | Toyota | 86 | Special Edition |
| 2019 | Toyota | 86 | TRD Special Edition |
| 2023 | Toyota | GR86 | 10th Anniversary Special Edition |
| 2022-2026 | Toyota | GR86 | Base |
| 2025 | Toyota | GR86 | Hakone Edition |
| 2022-2026 | Toyota | GR86 | Premium |
| 2024 | Toyota | GR86 | TRUENO Edition |
| 2026 | Toyota | GR86 | Yuzu Edition |
