SBF 289/302 MSD Ignition Digital 6AL Box w/Pro Billet Distributor & Coil: Automotive. Buy SBF 289/302 MSD Ignition Digital 6AL Box w/Pro Billet Distributor & Coil: Distributors - ✓ FREE DELIVERY possible on eligible purchases. This Kit includes the MSD 6AL Digital Ignition Box, a SBF Pro Billet Distributor and 40,000 volt coil. The MSD 6AL box has built in rev limiter and is compatible with 4, 6 and 8 cylinder engines with 12 volt negative ground electrical systems. It delivers 530 volts to the coil with up to 135MJ of spark energy per firing. Rev limiter can be set in 100 RPM increments with two rotary dials and has built-in LED light for system checks. Box includes wiring harness, vibration mounts and all necessary installation components. Speedmaster Pro Billet Distributor is precision CNC machined from billet 6061-T6 aluminum. Under the brass terminals of the cap and rotor is an extremely accurate magnetic pickup that never requires adjustment along with an easy to adjust mechanical advance mechanism. The heavy duty 1/2" steel shaft is guided in a long sintered bushing as well as a sealed ball bearing at the top to precisely locate the reluctor. This combination yields stable timing and spark at any RPM. The Speedmaster coil delivers 40,000 volts and features E-core windings, brass terminals and durable rynite housing. . . .