CSF Second Fuel Rail Kit for CSF BMW S58/B58 Air-To-Air Manifolds

The CSF "No Limit" B58 & S58 Air-to-Air Billet Manifolds (CSF #8401 & #8402) come with one fuel rail for port injection (for 6 injector setups). For those looking to run dual port injection, CSF offers a second fuel rail kit. The CSF #8404 Fuel Rail Kit comes with all the necessary mounting hardware and features the same -8 ORB fitting as the primary rail. It can be set up as a return or returnless system.

This Part Fits:

Year	Make	Model	Submodel
2023-2026	BMW	M2	Base
2023-2026	BMW	M240i	Base
2022-2026	BMW	M240i xDrive	Base
2021-2026	BMW	M3	Base
2021-2026	BMW	M3	Competition
2022-2026	BMW	M3	Competition xDrive
2024	BMW	M3	CS
2020-2024	BMW	M340i	Base
2020-2024	BMW	M340i xDrive	Base
2021-2026	BMW	M4	Base
2021-2026	BMW	M4	Competition
2022-2026	BMW	M4	Competition xDrive
2025	BMW	M4	CS
2023	BMW	M4	CSL
2021-2024	BMW	M440i	Base
2022-2024	BMW	M440i Gran Coupe	Base
2021-2024	BMW	M440i xDrive	Base
2022-2024	BMW	M440i xDrive Gran Coupe	Base
2020-2024	BMW	X3	M
2020-2022	BMW	X3	M Competition
2020-2025	BMW	X4	M
2020-2022	BMW	X4	M Competition
2022-2026	BMW	Z4	M40i
2024	Toyota	GR Supra	45th Anniversary Edition
2021-2022	Toyota	GR Supra	A91 Edition
2023	Toyota	GR Supra	A91-MT Edition
2020-2026	Toyota	GR Supra	Base
2020	Toyota	GR Supra	Launch Edition
2026	Toyota	GR Supra	MkV Final Edition
2020-2026	Toyota	GR Supra	Premium