The MSD 7AL-2 Plus updates the original 7AL-2 — long the most popular ignition control in drag racing — with improved internal components, a built-in 2-Step Rev Control, and a diagnostic LED. Voltage output and spark energy climb over 40% above the original, and two terminal strips make wiring easier in the car. The diagnostic LED above the power connections flashes only when the coil fires, confirming the coil, trigger source, and ignition are all working properly.
Specifications:
- Product Type: Ignition Box
- Color: Gold
- Primary Voltage: 570V / Secondary Voltage: 47,000V
- Spark Energy: 160 mJ per spark
- Maximum RPM: 14,000 RPM (at 14.4V)
- Current Draw: 6 Amps at 6,000 RPM / 12 Amps at 12,000 RPM
- Voltage Required: 12-18V, Negative Ground
- Rev Limiter: Built-in 2-Step, supplied with 3000/7000/8000/9000 RPM chips
- Weight & Size: 4.85 lbs., 8.25"L x 3.75"W x 5.75"H
- Part Number: 7222
Operates on 4, 6, or 8-cylinder engines and uses terminal strips for convenient hookup; mounting pattern matches the original 7AL-2.
Compliance: This part is legal for sale and use on Racing Use Only Vehicles — competition vehicles that are not registered and never operated on the street. It is against the law to install this part on an Emissions Controlled Vehicle (1966-and-newer California-certified or 1968-and-newer federally certified vehicles).
FAQ
Is the 7AL-2 Plus street legal?
No. It carries Emission Code 4, meaning it's legal for sale and use only on Racing Use Only vehicles — competition cars that are never registered or driven on the street.
What rev control does the 7222 include?
It has a built-in 2-Step Rev Control and ships with 3000, 7000, 8000, and 9000 RPM plug-in chips.
How does the diagnostic LED work?
The LED above the power connections flashes only when the coil fires, giving a quick visual check that the coil, trigger source, and ignition are all functioning correctly.
What engines does the 7AL-2 Plus support?
It operates on 4, 6, or 8-cylinder engines and is rated to 14,000 RPM at 14.4 volts.
