The 6ALN Ignition Box is designed with circle track racing in mind and is approved for use by NASCAR. Features MSD's race winning capacitive discharge ignition design, combined with heavy duty vibration protection. It features the correct connector to form a positive locking and sealed connection. For added protection, a two part silicone elastomer encases the circuit board making it impossible for parts to vibrate loose. To top it off, both ignitions are equipped with sturdy vibration mounts. The 6ALN features a built-in SoftTouch Rev Control