6/25/2021: This product is discontinued by the manufacturer.

AEM's EMS-4 Universal Standalone engine management system is designed for Powersports and 4-cylinder race vehicles. This affordable, lightweight, compact and powerful system features robust Series 2 EMS hardware in a weather and shock proof enclosure, with a 36-pin connector specifically designed to survive harsh racing environments.

The EMS-4 has all of the features you need and nothing you don't (like AC, power locks, stereo, etc.) for dedicated 4-cylinder racecars, motorcycles, quads, side by sides or other race vehicles up to four cylinders.

• 36-pin connector that is specifically designed to operate in harsh environments
• Completely sealed and weather/shock proof, allowing it to be mounted anywhere
• Works with MAG or HALL crank inputs and can directly drive smart coils or an external igniter such as AEM's 4-Channel Coil Driver (part # 30-2840)
• Compact (4.8" x 4.55" x 1.44"), weather/shock proof enclosure
• Utilizes AEM Tuner interface software
• System is fully enabled and unlocked - Never pay for upgrades!
• Context sensitive help eases tuning process
• Maps can be Password Protected to prevent unauthorized usage sharing
• Data analysis using AEM data software

• Universal Fitment

• Sample product image shown.