The Universal 12 Position Trim Pot is for use on virtually any Engine Management System, such as the AEM EMS. Use the Trim Pot to adjust a number of trims, including ignition timing, fuel, boost, etc. The Universal 12 Position Trim Pot includes: 12 Position Trim Pot with Flying Lead, 2 Brushed Silver Trim Position Decals with ranges from -5 to +6 and 0 to +11, Blue/Red/Black AEM Logo Knob Decals & Blue/Red/Black Colored Knob Decals.Can be used with virtually any engine management systemIncludes a weatherproof-over-molded flying lead that has 12-inch insulated, color-coded wires, two brush silver Trim Position decals, and black AEM logo adjustment knobAdjusts a number of trims, including ignition timing, fuel, boost, etc.http://www.aemelectronics.com/files/instructions/30-2056%20Universal%2012%20Position%20Trim%20Pot.pdf