CSF Second Fuel Rail Kit – BMW B58 / S58 Billet Manifolds

OVERVIEW

The CSF Second Fuel Rail Kit (#8404) adds a second top-feed fuel rail to CSF's "No Limit" billet air-to-air manifolds (#8401 B58 and #8402 S58). It takes the manifold from six to twelve port injectors, giving high-horsepower BMW B58 and S58 builds a dual port injection setup. The rail uses the same -8 ORB fitting as the primary rail and can be run as a return or returnless system.

SPECS

• CNC-machined 6061 billet aluminum fuel rail, made by Custom Plenum Creations in Australia
• Adds six top-feed port injectors (12 total with the primary rail)
• Same -8 ORB fitting as the primary rail
• Supports return or returnless fuel setups
• Fits CSF #8401 and #8402 "No Limit" manifolds only
• 2-year warranty to the original purchaser under normal use

PARTS INCLUDED

• Second fuel rail
• Mounting hardware
• -8 ORB plug for returnless setups

TECH RESOURCES

Additional Parts Required

• CSF "No Limit" billet manifold. This rail fits only the CSF "No Limit" Air-to-Air Manifold (#8401 B58 / #8402 S58).
• Six port injectors, sold separately.
• Fuel feed plumbing and fittings, sold separately.
• A supporting tune for dual port injection, sold separately.

Installation

• CSF does not publish a downloadable installation PDF for this part. The rail mounts to the second set of injector bungs and rail mounts on the CSF "No Limit" manifold.
• Installation should be done by an experienced technician familiar with port injection fuel systems.

Notes

• The table below lists the BMW vehicles CSF fits the "No Limit" manifolds to.

PART NUMBER

• 8404

VEHICLE APPLICATIONS