The throttle body and ECU are combined into one unit with the Sniper 4500. It literally fell into place when it came time to test-fit it to the intake, without any issues at all. Routing the wiring wasn't that bad either, and you have a lot of freedom to do it different ways based on your application.
Holley approached the design process of the Sniper 4500 from the very start to make it easy to install.
“The Sniper 4500 is designed to be a direct bolt-on replacement for most 4500 carburetors. We included scoop mounts on top of the throttle body and all of the dimensions of the unit are similar to a 4500 carburetor to make swapping simple. The ECU is actually on the throttle body itself, so that removes the need to have an ECU mounted somewhere else, and removes complex wiring. When you look at the wiring harness that is used you can see they are simple and use OEM quality connectors,” Matthew says.
You may have heard before that a product is “simple” to install but find out it’s far from easy when it comes time to do the installation yourself.
The Sniper 4500 is designed to be a direct bolt-on replacement for most 4500 carburetors. – Matthew Lunsford, Holley
The process was very straightforward and the directions are clear and concise, with plenty of diagrams that show you what needs to be connected and what all of the wires are for. We only had to use the basic four wire hook up for our installation that included the switched 12-volt ignition, battery ground, battery positive, and the RPM signal; the rest were removed from the harnesses to help with routing. The directions outline which color the wires are, plus the wires themselves also have their application information printed on them. All we had to do was run the wires from the harness to the correct locations on the car. For the switched ignition, we used a switch on the dash to power up the Sniper separately from the main power so it could remain powered up, even when the car wasn’t running. The battery power and ground were run directly to the battery per the directions; this is very important to do and shouldn’t be deviated from. Finally, we spliced into the RPM signal right at the MSD box to complete the wiring.
After that was done, we just cleaned up where the wires were, ran the setup wizard per the directions, and the dragster started up on the first attempt.