MSD Digital-6 Plus Ignition Control Box w/ 2 Step Rev Control - Universal engine The FlowFX system has a

The FlowFX system has a moderate deep powerful sound outside with minimal interior resonance

2017-2023 Ford F-250/F-350 4WD

CARB EO# D541-6 covers 1999-2012 EO# D-541-9 covers 2013-UP

5 Direct GPZ plates

MSD Digital-6 Plus Ignition Control Box w/ 2 Step Rev Control - Universal engine The FlowFX system has aThe MSD Digital 6 Plus Ignition Control Box (Part #6520) delivers high performance ignition power, precision control, and unmatched reliability for street or strip applications. Designed for racers and enthusiasts who demand accuracy and consistency, the Digital 6 Plus packs 135 millijoules of spark energy and 535 primary volts, ensuring a strong, consistent spark at every RPM. Its digital microprocessor constantly monitors voltage, timing, and RPM to