MSD designed this 7551 Launch Rev Limiter Switch Box for use with their Programmable Digital-7 Plus Ignition only. This handy controller lets you change the launch rpm setting instantly for last second changes due to track conditions. It plugs into the RS232 computer harness and has two rotary dials for adjustments. The launch setting can be adjusted in either 1,000 or 100 RPM increments. MSD 7551 Launch Rev Limiter Switch Box Features: Adjustable: Yes Adjustment Style: Knob Ignition Box Required: Yes Compatible with Multiple Coil Ignitions: 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.
