Digital Pro Shift Systems (Dpss) Are Programmable And Do Not Require A Separate Module Or Pills. They Are Available In Three Levels. The Gauge-Style Coordinates With Other Auto Meter Series, Such As Cobalt And Nv. The Black Or Silver Tube-Style Has A Unique A.I.M. Direct Line-Of-Sight Mounting Bracket, Enabling Left And Right Rotation And All-Direction Angle Adjustment. Both Are Compatible With 0.5 To 6 Pulses Per Revolution, Meaning They Work With Most Engines Up To 12 Cylinders.