I recently swapped the engine from my 2002 Harley with an engine from an 2003 Harley. The old engine had an Diablo sport tuning box installed. I didn't remove during the engine swap and it plugged in to my engine from the 2003 Harley. Is this Diablo compatible and will it harm my engine? Please help.

 

If it worked with one engine, it should work with the other. It doesn't do anything to the engine, it only modifies the computer programming.