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- Replacement Coupler
MSD Ignition 121-7991 Features:
Control Your Ignition Curve!
MSD Ignition Timing Controls are designed so engines with locked out timing or crank triggers can take advantage of an ignition curve. The weights and springs inside your existing distributor are removed and the mechanical advance is locked out so the timing is controlled entirely by the MSD Ignition Timing Control. By controlling the ignition electronically, the timing curves can be set faster, more accurately, and with more adjustablility than mechanical advances. The Ignition Timing Controls provide reliable operation throughout the RPM range.
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This MSD Adjustable Timing Control puts you in control from the drivers's seat with a dash-mounted control knob that allows you to adjust the ignition timing to compensate for changes in altitude, low octane gas, or heavy loads. The control knob mounts to the dash board for easy and accurate timing adjustments up to 15°. Features:
- Perfect For Every Day Driving & Racing Applications
- Increased Fuel Mileage & Performance
- For Use on 4, 6 & 8-Cylinder Engines
- Control Ignition Timing From the Driver's Seat
- Timing Adjustments up to 15°
- 50-State legal - CARB E.O Number D-40-28Note: Must be used with an MSD 6, 7 or 8-Series Ignition Control
