EMS – Ultimate Aux Fuel Solution (UAFS) Bundle for 2013-2018 Focus ST or RS

Boost Your Focus ST or RS with the EMS 1300CC Port Injection Bundle

If you’re stepping into the world of port injection, the EMS Port Injection Kit is one of the best ways to do it right the first time. This isn’t just a hardware upgrade — it’s a full system built to give your Mustang EcoBoost the extra fueling it needs when you start pushing power, running ethanol, or preparing for big boost.

Choose Your Configuration

Option 1 — EMS Port Injection Kit Only

This gives you the core hardware needed to add port fuel injection to your Focus ST or RS.

What’s Included

• EMS Port Injection Adapter Plate

• Fuel Rail & Fittings

• EMS Mounting Bracket & Injector Spacer

• MaxxECU MINI Controller (port kit version)

• 2-Pin DTM Connector

• Your choice of injector size (1300cc or 2200cc)

This is the perfect entry point for those wanting reliable fueling support beyond the OEM fuel system.

Option 2 — Port Injection Kit + EMS Ultimate Aux Fuel Solution (Full UAFS)

Add real auxiliary fuel system support on top of your port kit — recommended for ethanol blends (E30/E85), high boost levels, and big power builds.

Includes Everything From Option 1 Plus:

• MaxxECU MINI Controller (UAFS version)

• EMS Mounting Bracket (UAFS ready)

• Kaizen Power Relay (UAFS)

• 2-Pin DTM Connectors (UAFS)

• Flex Fuel Sensor Kit (UAFS)

• Optional but recommended: DW400 Low-Side Fuel Pump upgrade

This configuration gives you both the hardware to port fuel and the advanced auxiliary fuel system needed for safer, more reliable fueling under load.

Option 3 — UAFS Only (Aux Fuel Support Only)

For customers who already own a working port kit for their Focus ST or RS and only want to add the advanced auxiliary fuel upgrades.

Included:

• MaxxECU MINI Controller (UAFS version)

• EMS Mounting Bracket (UAFS)

• 2-Pin DTM Connectors (UAFS)

• Kaizen Power Relay (UAFS)

• Flex Fuel Sensor Kit (UAFS)

Not Included (Assumes You Already Own):

• Port injection adapter plate

• Rails & fittings

• Injector spacer

• Injectors

• Port kit controller hardware

This option lowers cost by excluding hardware you already have while giving you the fuel system upgrades that matter most for ethanol and high-boost power.

Pricing Examples (Reflects EMS Range)

*These prices reflect the overall range shown on the EMS listing for Focus ST/RS (which spans $1,288.29 up to $2,574.00 depending on options selected). Actual pricing at checkout may vary based on injector size and wiring integration considerations.

How Each Option Works

• Port Injection Only: Adds port fueling hardware so you can reliably add fuel beyond what the stock high-pressure direct injectors can deliver.

• Port Injection + UAFS: Best choice for builds running ethanol blends or over ~30 psi of boost — real-time ethanol sensing and auxiliary fuel control make fueling safer and more consistent.

• UAFS Only: Ideal if you already have a functioning port kit and want auxiliary fuel upgrades without buying redundant parts.

Optional Wiring Integration

Professional wiring integration is available for any configuration (port kit only, full UAFS, or UAFS-only) to ensure a clean, plug-and-play harness that works seamlessly with the MaxxECU controller and all auxiliary sensors and relays. Typical wiring service pricing aligns with what is offered on EMS Mustang and Focus listings.

Why Choose EMS Fueling Solutions for Focus ST / RS

The EMS port injection system and UAFS packages are designed as complete, scalable solutions for Focus owners looking to safely fuel high-boost and ethanol applications — with hardware and controls engineered specifically for Ford EcoBoost engines