The MSD 6AL Ignition Control set the standards that other ignitions strive to reach. Inside the Digital 6AL you will find a microprocessor that monitors and controls every firing and rev limit. Featuring: Soft Touch Rev Control.Higher output with 530 primary volts and 135mJ of spark energy. Efficient components use less current to produce more power. Set an rpm limit on the 6AL with two rotary dials. Same bolt pattern as the original 6AL with a lower profile housing. Built-in LED for system checks. All wires exit the same side through a locked, sealed connector. Compatible for 4, 6 or 8-cylinder engines.