Stage X V5/6 TOP FEED FUEL RAIL CONVERSION KIT / ROTATED TURBO

Billet fuel rails for performance engine projects, designed for earlier side-feed injector setups where improved fuel feed and routing is essential.

In the standard Subaru fuel system, a pump sends fuel from the tank to the front of the car, through the fuel filter in the engine bay and into the fuel rails. Fuel then reaches the cylinders one by one, starting with cylinder four. The fuel pressure regulator at the end of the rails acts like a flood gate, backing up the pressure so that each cylinder has a supply.

A more efficient approach is to give each cylinder its own equal amount of fuel, so that no cylinder is left "thirsty" compared with the rest. This is what a parallel fuel rail design does.

In Stage X parallel fuel rail kits, fuel leaves the fuel filter and passes through a Y-piece separator, which sends it to both rails at the same time. This removes the problem of one cylinder running lean and lets the system hold more fuel in reserve, thanks to the larger-diameter rails and lines.

This kit is intended for modified cars where fuel control is vital to maintaining power and engine safety. The included performance fuel pressure regulator gives maximum fuel control with minimum flow restriction for engines up to and beyond 1500 HP. Advanced bypass technology and an enlarged port design provide accurate fuel pressure control across the range, allowing the fuel pump to push more, draw less current and meet fuel volume demand with no pressure creep.

Remapping the car after installation is recommended, so that all ECU fuelling parameters are matched.

• T6061 aluminium extrusion with a military-grade black anodised finish
• Stainless steel -6 shouldered male fittings on each rail, ready to connect to braided fuel lines
• All necessary mounting brackets, stainless steel hex screws and rubber O-rings for a complete installation

These rails are intended for use with top-feed injectors.