# 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.

-   For secondary top feed port injection (additional 6 injectors for a total of 12 injectors) on the CSF #8401 and #8402
-   CNC machined 6061 Billet Aluminum Made by CPC (Made in Australia)
-   Includes -8 ORB plug for returnless setup
-   Includes Mounting Hardware

## Details

- **Price:** 440.49 CAD
- **Vendor:** CSF
- **Type:** Intercoolers

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 440.49 CAD | In stock |

## Images

- Photo - Primary
- Photo - Close Up
- Photo - Close Up
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/csf-second-fuel-rail-kit-for-csf-bmw-s58-b58-air-to-air-manifolds)
> Updated: 2026-08-23