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Before: The stock carb before removal. EZ-EFI fuel injection was necessary in order to manage the huge overlap and duration of the camshaft.

The F.A.S.T/ EZ-EFI fuel injection upgrade includes a new throttle body and all electronics

After: The carburetor has been removed and replaced with the F.A.S.T. throttle body unit, plumbed and wired. The result is factory like throttle response right off idle all the way to WOT.

Note: F.A.S.T. computer tucked away behind battery

In the case of TPI updates, the engine retains its own runners and throttle body and the system is wired in to replace the factory computer.