4-BBL Multi-Point Kits

Multi-point fuel injection systems are more sophisticated than the 2-BBL and 4-BBL TPI kits mentioned elsewhere on this website and may require a bit more experience for installation. Multi-point fuel injection is generally considered a superior method of fuel injection to throttle body injection for those who need maximum performance. By injecting the fuel directly at the intake port, the weight of the fuel is not carried as far through the intake. This maximizes atomization and increases air flow. By providing a one injector per intake valve, fueling is much more precise, and the Holley HP ECU even allows you to do cylinder-specific fuel mapping (if desired.)

All of the Holley Multi-Point Fuel Injection Kits include the fuel-injector ready intake manifold and are therefore application-specific. If you do not see your application listed below, don't lose hope--you can still equip your vehicle with Holley Multi-Point Fuel Injection! If you are starting with an engine that has a standard square-bore or spread-bore carburetor, choose one of the Universal EFI Retrofit Kits. These are very similar to the kits listed here, but instead of including the intake, it includes all of the components you will need to turn your existing manifold into a multi-point fuel injection manifold. If your starting point is some other engine/fuel system, consider the Holley ECU/Harness Kits.

Holley Avenger Multi-Port Fuel Injection Kits include virutally every part you will need for your install. You will need to source an adequate amount of fuel hose and steel fuel line for your particular application. The fuel line is required for those applications where no return line exists from the engine compartment back to the fuel tank, as EFI fuel pumps are regulated by returning excess flow to the tank. A 50 psi fuel pressure gauge will ensure that your fuel system is working as required, or optionally you can purchase a fuel pressure sensor (see our EFI Accessories > Sensors page to find the sensor that will allow you to constantly monitor fuel pressure when your Avenger system is running.

Holley HP Multi-Port Fuel Injection Kits are not as inclusive as the Avenger kits, but rather allow the installer greater flexibility in choosing the right components for that particular application. The customer can visit our fuel injector and fuel pump pages to learn more about selecting those components. Other than this, the separately-required items are the same as those of the Avenger kits (see above.)

Here are series of questions to help you select the right Holley Multi-Point Fuel Injection Kit for your requirements:

1. Choose Avenger or HP: Are you looking for the convenience of a handheld controller (no laptop or software required) and like the idea of having the fuel pump and injectors pre-selected? Then jump to 2. Choose Your Avenger Multi-Point Fuel Injection Kit. Otherwise, if you need the flexibility and power of fully-programmable fuel injection, need to be able to select your own fuel pump and fuel injectors, and appreciate the power and flexibility of fully programmable EFI, jump to 3. Choose Your HP Multi-Point Fuel Injection Kit.

2. Choose Your Avenger Multi-Point Fuel Injection Kit. Avenger kits are available for Small Block Chevrolet and Big Block Chevrolet engines.

A. Choose The Avenger Kit For Your Small Block. Holley has an Avenger Multi-Point Fuel Injection Kit for your Small Block Chevy engine if you have Stock-type Heads (Early-to-Late) or Vortec Heads.

B. Choose The HP Kit For Your Big Block. Holley has an Avenger Multi-Point Fuel Injection Kit for your Big Block Chevy engine if you have a Standard Deck and Rectangular-Port Heads or Oval Port Heads.

3. Choose Your HP Multi-Point Fuel Injection Kit. HP kits are available for Small Block Chevrolet and Big Block Chevrolet engines.

A. Choose The HP Kit For Your Small Block. Holley has an HP Multi-Point Fuel Injection Kit for your Small Block Chevy engine if you have Stock-type Heads (Early-to-Late) or Vortec Heads.

B. Choose The Deck Type Of Your Big Block. Holley has an HP Multi-Point Fuel Injection Kit for your Big Block Chevy engine if you have a Standard Deck or aTall Deck.

1. Choose The HP Kit For Your Big Block With Standard Deck. Holley has an HP Multi-Point Fuel Injection Kit for your Big Block Chevy engine with Standard Deck if you have 1000 cfm Rectangular-Port Heads, 1000 cfm Oval Port Heads, or 2000 cfm Rectangular-Port Heads.

2. Choose The HP Kit For Your Big Block With Tall Deck. Holley has an HP Multi-Point Fuel Injection Kit for your Big Block Chevy engine with Tall Deck if you have 1000 cfm Rectangular-Port Heads or 2000 cfm Rectangular-Port Heads.

It is highly recommend that you review the installation instructions for the various Holley EFI Systems you are considering prior to making a purchase decision.