Killshot™ 4-bbl EFI System
Awesome April Promotion! This kit will come with a free:
- Pressure Sensor Kit, Adjustable AN Wrench, & Air Filter Kit!
- Versions with the Quick Draw TCM will also be upgraded to the 7" Pro Dash!
Valid 04/01/24 - 04/30/24
*Free items may ship at a later date due to large influxes of orders during a promotion. All other items ship at normal times.*
Step 1:
(Scroll down to read how they're different)
Step 2:
Description
Aces' Killshot EFI system is one of the most advanced throttle body injection (TBI) systems on the market. The Killshot 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, WBO2 sensor, ECU, and a 5” touchscreen handheld programmer for easy tuning and monitoring of engine data.
The Killshot system fits most 4150-flange 4-barrel intake manifolds and is designed for easy installation and tuning. 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 system 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!
For timing control, the Killshot requires a magnetic pickup or hall effects distributor and separate ignition coil. We recommend our Black Jack Pro series distributor and ignition coil for a plug & play experience.
Aces EFI Killshot™ TBI System Features
- 32-bit software (OEM standard) that manages input/output signals, voltage, and RPM faster and more consistently than competitors
- 5” full-color touchscreen handheld with built-in GPS speedometer
- Integrated coil driver for ignition timing control
- Simple calibration wizard for initial setup- no laptop tuning required.
- Self-learning fuel table
- Dual fan control
- Step retard for nitrous control
- Boost compatibility (using laptop software)
- Remote-mounted ECU to avoid common heat/vibration-induced hardware failures
- 3-bar TMAP sensor for boost & nitrous compatible (using laptop software)
- Free laptop software available for pro applications
- Compatible with Aces’ handhelds, dashes, CAN modules, and TCMs.
- Bosch 4.9 WBO2 sensor
- (4) 100 lb/hr injectors
Free shipping on orders over $300 through the end of April!
Lower 48 states only.
Kit Types
Your guide to understanding our kit options.
EFI Kit Only
Just the Killshot EFI system with it's throttle body, ECU, harnesses, sensors, and hardware.
Generally compatible with competitor's ignition systems, but we recommend checking with us first to verify.
Fuel Kit
A Killshot EFI Kit + a fuel system of your choosing.
Top End Kit
A Killshot EFI Kit + our Ignition Coil and Black Jack Pro Magnetic Distributor of your choosing. Ideal for running timing control on your engine.
Master Kit
A Killshot EFI Kit + our Ignition Coil and Black Jack Pro Magnetic Distributor of your choosing + an inline fuel pump or pump module kit of your choosing. A complete package that includes all the components you need to convert your engine from carb to EFI!
650 HP
Best suited for 200-600 HP applications, the Killshot can support up to 650 HP* enabling your engine to reach its fullest potential.
*Naturally aspirated
If the Shoe (throttle body) Fits..
The Killshot 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 prevelant 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 mins of idling and drive time, the system will build it's own tune so you don't have to. Click here to learn more about our handhelds and dashes and see all of their features.
*Self-learn 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!
Compare Aces EFI TBI Systems
See how our 2-bbl and 4-bbl systems compare to each outer and the advantages of each.
(2) 100 lb/hr
(4) 100 lb/hr
(4) 100 lb/hr
No
No
Yes
Yes
Yes
Yes
Black & Polished
Black, Polished, & Gold
Black & Polished
2300
4150
4150
Yes. Blow-thru and draw-thru.
Yes. Blow-thru and draw-thru.
Yes. Blow-thru and draw-thru.
Compare Aces EFI vs. Other TBI Systems
Aces Killshot
Holley Sniper 2
FiTech GoEFI600
ECU Housing
External, automotive-grade, die-cast aluminum.
ECU is mounted on the throttle body.
ECU is mounted on the throttle body.
MCU
32-bit, ST56 series Power Architecture™ (OEM Standard)
16-bit
16-bit
Handheld
5", full-color, capacitive touch screen. Includes built-in GPS chip for speedometer.
3.5" resistive touch screen
3.5" screen
Appearance
Only one connector to throttle body (bundled).
Several separated cables & wires
Several separated cables & wires
Injectors
(4) 100 lb/hr injectors
(4) 100 lb/hr injectors
(4) 100 lb/hr injectors
HP
650 HP N/A
650 HP N/A
600 HP N/A
Timing Control & IGBT Driver
Has timing control features and an integrated IGBT driver
Has timing control but no IGBT driver
-
Spark Energy
Programmable dwell time. Min. of 90 MJ spark energy when using our AC2008 ignition coil.
-
-
Retail Price
$959.99
$1,299.95
$999.99
Product Specs
800 CFM
Cast Aluminum (throttle body)
Yes
5"
3-5/16”
3-bar
-6 AN
100 lb/hr
42-48 PSI, 60 PSI max
Compatible, yes. Control requires a separate module.
Black ceramic, gold, or polished
650 HP (naturally aspirated)
What's in the box?
Free items are not shown in this list since promotions vary from time to time. Some items in the kit may be replaced with an upgraded version during a promotion.
4-bbl Throttle Body
x1
Killshot ECU
x1
5" Handheld
x1
Main Harness
x1
Sub-harness
x1
4.9 WBO2 Sensor
x1
Coolant Temp Sensor
x1
Harness Grommet
x1
Additional Harware
x1 of each
USB Adapter
x1 of each
Things to know
& other FAQs.
Emissions Statement
This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.
The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:
1965 and older U.S. manufactured California Certified vehicles
1967 and older U.S. manufactured Federally Certified vehicles
1967 and older Foreign manufactured vehicle
WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
The following vehicles are considered Emissions Controlled Vehicles:
1966 and newer U.S. manufactured California Certified vehicles
1968 and newer U.S. manufactured Federally Certified vehicles
1968 and newer Foreign manufactured vehicle
Marine Applications?
Is it marine or coast guard approved/certified? No. None of our products are.
Do we recommend it? No, since water and engines don't generally mix and warrantying items in these conditions becomes tricky. These are also modified applications that are not 100% what the systems were designed for.
Will it work? Yes, with some modifications for the WBO2 sensor.
Is it E85 compatible?
Yes, you just would need to change some settings first in order for it to work.
Please note that damages to the system caused by the use of E85 or other racing fuels are not covered by our warranty policy. This is because E85 is known to corrode certain types of material over time and our systems were not designed for long-term E85 use.
Will it work with aftermarket or stock gauges?
The system is not generally setup to work with stock gauges which is why we provide the handheld to display all the readings. Aftermarket tachometers will work with the system, and we are working to provide support for other popular aftermarket gauges soon!
What is your warranty policy?
All products have a limited one year warranty against any defects or quality of workmanship from date of purchase.
Our warranty is extended to the original consumer only. This limited warranty is not assignable or otherwise transferable. Customers must provide proof of purchase for warranty claims.
Aces’ warranty does not apply to products, which have been:
- Modified or altered from factory condition.
- Subjected to adverse conditions, such as misuse, neglect, accident, improper installation or adjustment, dirt or other contaminants, water, or corrosion.
- Installed in other applications not recommended by Aces Fuel Injection.
What is your refund and return policy?
Aces Fuel Injection is happy to accept returns on orders returned to us inside our policy as long as they are new and unused. In general, items must be returned within 30 days for a full refund or within 60 days for a 10% restocking fee.
For our full Refund & Return Policy, that has all of the fine print, you can access it here.
What kind of tech support do you offer?
Aces offers general support on product setup, installation, troubleshooting, and basic diagnostic help.
While most stock-mild applications do not require tuning, some applications (usually more aggressive cams or boosted applications) may require additonal tuning beyond what the self-learn is capable of. Aces does not offer custom tuning though we can recommend Authorized Aces Tuners who may charge a fee for their services. Read more about our support services and what to expect here.