In this MSD Atomic Turbo LS Test, we take the new Atomic EFI and install it to our LS3 crate engine to see just how much horsepower we could get out of it.

It plugs into the factory crank, cam, and coil harnesses and controls the ignition timing curve, rev limits, and fires any GM, LS style coils.

In this Tech article, we show you how to add boost to your 5.3L LS engine by adding a carburetor, a cam, and a turbo. We got this baby up to 611-horsepower!