These MSD 6AL ignitions are the perfect choice for the street or the track. The powerful capacitive discharge, multiple sparks ensure complete combustion of the air/fuel mixture to increase power and performance. MSD has taken the proven performance of the 6A and added a rev limiter. The soft touch rev control will protect your engine from overrevving. Adjustments are easily made with plug-in modules, so there are no dials, switches, or programs to deal with. At your selected rpm, the soft touch begins dropping the spark to some of the cylinders, and on the next cycle, these same cylinders are fired to prevent loading up with fuel. The result is a smooth and accurate limiting action without backfires or roughness. They'll work with virtually any 4, 6, or 8-cylinder vehicle with a distributor, as long as it has a 12-18 V electrical system. They include rubber shock mounts and modules for 3,000, 6,000, 7,000, and 8,000 rpm.
The MSD 6420 - MSD 6AL Ignition Control with Rev Limiter, 4, 6 (even-fire only) 8-Cylinder shares the same proven circuitry of the 6A with the addition of a built-in adjustable rev limiter. The combination of powerful sparks with the safety of a Soft Touch Rev Control is what makes the MSD 6420 the most popular ignition control in the world. MSD first developed the Soft Touch rev control to prevent overrev damage to your motor in the event of a missed shift or driveline failure. The rpm limit is adjustable in 100 rpm increments with MSD's plug-in modules. When the engine reaches your selected limit, the Soft Touch circuitry begins dropping the spark to various cylinders. On the next cycle, these plugs are fired again to prevent fuel from loading up in the cylinder. The result is a smooth and accurate limiting action without backfires or roughness. The Soft Touch Rev Control also opens the door for you to add rpm accessories such as a Two Step Rev Control. A Two Step allows you to set two rpm limits, one for a holeshot rpm and another for overrev protection. The MSD 6420 - MSD 6AL Ignition Control is supplied with rubber shock mounts and modules for 3,000, 6,000, 7,000 and 8,000 rpm.
MSD 6420 Features
Includes rubber shock mounts
Includes modules for 3,000, 6,000, 7,000 and 8,000 rpm
Great product! I love it and how well it works...only problem is it won't function in over 200deg temps.....I found out the hard way! Install it in your glove box where it's cool!
JDM Isuzu reviewed MSD 6AL Ignition Control part # MSD-6420
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