CSF · New
CSF Second Fuel Rail Kit for CSF BMW S58/B58 Air-To-Air Manifolds
MPN 8404 · Store SKU csf8404
Supplier stock checked 11/8/2026, 3:55:06 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
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 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. The second fuel rail kit is made by CSF's long time strategic manufacturing partner Custom Plenum Creations (CPC) and only fits the CSF #8401 & #8402. Second Fuel Rail Kit for CSF 8401/8402 B58 & S58 Air-to-Air Billet Manifolds
Manufacturer fitment & guides
Check 8404 against the manufacturer’s application information below.
Part-specific notes
- Not CARB approved. Destination and intended-use restrictions must be checked before sale.
- Emissions acknowledgement required before purchase.
