Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)
Royal Flush Master Kits (Gold)

Royal Flush Master Kits (Gold)

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Sale price$1,660.09 Regular price$2,728.58
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Kit Type: Master Kit (Gold)

Kit Type

Standalone SystemFuel KitTop End KitMaster Kit (Black)Master Kit (Gold)Master Kit (Polished)
Handheld Option: Bluetooth Module Only

Handheld Option
Distributor: SB/BB Chevy

Distributor
Fuel Delivery System: 255 In-line Fuel System

Fuel Delivery System

Product Info

Master Kits:

Royal Flush EFI Master Kits are designed for those upgrading from a carburetor or stock fuel injection and want a complete conversion kit that includes everything needed to make the switch. Each EFI Master Kit comes with a standalone EFI system, a complete fuel delivery system, a Black Jack Pro Magnetic Pickup Distributor, and a Black Jack Pro Series Ignition Coil.

Standalone Overview:

Aces EFI’s Royal Flush EFI/CDI is the most powerful TBI system on the market! Integrating our EFI control module and CDI ignition system inside one ECU, this is a revolutionary upgrade and huge leap forward in the world of aftermarket EFI products. By using CDI, you are able to create a much hotter spark in order to burn fuel more efficiently and ensure maximum power, especially in boosted and performance applications.

The Royal Flush EFI/CDI system utilizes four 100 lb./hr. fuel injectors, giving the system the capability of supporting up to 650 horsepower. The system includes the throttle body (with integrated fuel injectors, TPS sensor, MAP sensor, IAT sensor, and stepper motors), wiring harness, wideband O2 sensor, ECU, and a 5” touchscreen handheld programmer for easy tuning and monitoring of engine data. 

The system fits any 4150-flange 4-barrel intake manifold and is designed for easy installation and tuning. Installation is straightforward and easy, and the system includes everything you need to get on the road or track quickly. For stock to mild applications, the calibration wizard and self-learning features mean advanced tuning knowledge or experience is not required. But for more aggressive or performance oriented applications, Aces offers a full tuning software suite and USB data cable for advanced manual tuning.

Aces designed its throttle body systems with the ECU separate from the throttle body. This alleviates any issues with possible damage to the ECU from unwanted engine heat or vibration. This is a common problem with other “all-in-one” style systems on the market.

Whether you are building a budget beater or a boosted racing car, Aces EFI’s Killshot EFI kit has the technology and advanced features you need, in an easy-to-install, easy-to-tune package so you can take your ride to the next level!

If the Shoe (throttle body) Fits.

The Royal Flush system was designed with a 4150 style flange, making it an exact fit for the majority of small and big block applications. If your manifold is different, you can simply use a flange adaptor to make it work. The system is generally compatible with stock ignition, but to take advantage of timing control features that the system offers, you'll want to use a magnetic pickup distributor and separate ignition coil- both of which are included in our Top End and Master Kits!

Computing Power

A robust remote-mounted ECU that utilizes our OEM standard 32-bit architecture. This allows the system to manage input/output signals, voltage, and RPM faster and more consistently than our competitors. A remote-mounted ECU allows it to avoid dreaded heat-and-vibration-induced hardware failures that are prevalent in other aftermarket systems.

Plug 'n' Play

Not a tuning wiz? You don't need to be since we provide a wizard for you. Our self-learning* functionality means you only have to answer a few basic questions in the startup wizard, and then the ECU takes care of the rest. After about 30-60 minutes of idling and drive time, the system will build its own tune so you don't have to.

*Self-learning works best for stock-mild applications. For more aggressive applications and even some stock-mild applications, we offer free tuning software on our website.

Boost it, baby!

Each TBI unit comes with a built-in 3-bar MAP sensor that will allow you to run up to 27lbs of boost!

Master Kit Feature

(Fuel) Pump Up the Jam

Each Master Kit will come with a fuel system of your choosing. You can scroll down to read more about the available options below.

Aces Fuel Injection, Inc. 255 In-line Fuel Pump System with PTFE Hose 255 In-line Fuel Pump System with PTFE Hose

255 In-line Fuel System

A frame-mounted in-line pump with all of the necessary fittings and hose.

Aces Fuel Injection Command Center 2 + PTFE Kit + Pressure Sensor Kit Command Center 2 Surge Tank

Command Center 2

A surge tank system that allows you to keep your mechanical pump in place. A better option for classic trucks or other vehicles where the tank is hard to access.

Aces Fuel Injection Pump Module & 40' PTFE Hose Kit + Pressure Sensor Kit Tight Fit In-Tank Pump Module (255 LPH)

Tight-fit In Tank Pump Module

An in-tank fuel pump module available with or without PTFE hose.

Requires a return line to the tank.

Aces Fuel Injection Pump Module & 20' PTFE Hose Kit + Pressure Sensor Kit Tank Conversion Pump Module w/Internal Regulator (340 LPH)

Tank Conversion Fuel Pump Module

An in-tank fuel pump module with an internal regulator. Ideal for fuel cells.

Does not require a return line to the tank.

Master Kit Feature

Distributors for Days

Each Master Kit will also come with a Distributor of your choosing and an ignition coil to allow you to run timing control.

ACES Fuel Injection. Black Jack Pro Distributor

Magnetic Pickup Distributor

With over 15 options to choose from, our line of Black Jack Pro Magnetic Pickup Distributors lets you run your EFI with mechanical advance or lock it out to allow the ECU to control timing.

ACES Fuel Injection. Low Profile / Black Black Jack Pro Series Ignition Coils

Ignition Coil

The high-output magnet in the Black Jack Pro Ignition Coil creates 50,000 volts, or about 70% more spark energy over most stock-style applications, giving you a significantly hotter and larger spark for more complete combustion. This helps create more horsepower and torque, providing smooth acceleration throughout the entire RPM band.

How do I set up and program my system?

Interface Options

Our EFI systems are self-learning for most stock-to-mild engine builds. You’ll use one of the included interface modules (depending on the option selected at purchase) to complete the initial setup and make adjustments on the fly. The startup wizard will prompt you with 6–12 setup questions, after which the self-learn feature takes over.

Additional fine-tuning may be required later, depending on your specific build.

Bluetooth Module

Compatible with Android and iOS* devices and plugs into the CAN connection on the main harness.

Android is available via download here, or in the Google Play Store Fall of 2025.
iOS is available Fall of 2025

5" Handheld (3rd Gen)

  • Capacitive touch screen
  • 64-bit processor
  • 1920x1080 resolution
Aces Fuel Injection Dash 7" Handheld (2nd gen)

7" Handheld (2nd Gen)

  • Capacitive touch screen
  • 32-bit processor
  • 1024x600 resolution

Most common questions

Quick answers to our most common queries for this product.

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