Ignition Modules are also PC Programmable: EIGHT POINT FULLY DEFINABLE WIDE OPEN THROTTLE CURVE EIGHT POINT FULLY DEFINABLE PART THROTTLE CURVE LIMIT PROGRAMMABLE IN 50 RPM STEPS PROGRAMMABLE DEAD CRANKING REVS 0-10 PROGRAMMABLE REAR CYLINDER OFFSET, TOTAL OF 10 DEGREES Specifications: Data Recording: TOTAL ENGINE HOURS TIME AT WIDE OPEN THROTTLE NUMBER OF ENGINE STARTS (TWO MINUTES RUNNING COUNTS AS ONE) TIME OPERATING AT WIDE OPEN THROTTLE MAXIMUM RPM SECONDS NEAR LIMIT STATISTICAL ANALYSIS OF TIME AT RPM Part Number: 53-644 Fit For the Following Models: Fits: , for , , Revtech, Shovelhead, and any based motors. 1970-1999 Carbureted Big Twin for Models and 1971-2003 models except 1200S Sport. Will NOT fit EFI Models Material: MetalandABS colour: Black Package Contents: 1 x Ignition Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.