MSD designed this 8734 2-Step Launch Control for 4.6L/5.4L Modular Ford Engines from 1999 and up. This 2-Step connects right to your late model GM to produce consistent launches and quicker 60-foot times by setting an RPM limit to stage with. Designed for Manual and Automatic Transmissions! When staged, hold the pedal to the floor while the rpm stays at a consistent level producing consistent launches. RPM is easily controlled with two built-in rotary dials ranging from 1,000-10,900 rpm in 100 RPM increments, respectively. MSD 8734 2-Step Launch Control Features: Designed for 1999 and later 4.6L and 5.4L Ford Coil-On-Plug Systems ONLY Includes Starting Line Rev Limiter: Yes Includes High End Rev Limiter: Yes Includes Burnout Rev Limiter: No Quantity: Sold Individually From street cruisers to Top Fuel dragsters, MSD's ignition systems have been the industry leader for over 40 years. MSD continues to push the envelope with cutting-edge ignition technology as well as intake manifolds and EFI systems.