when I was talking to harley customer service about the stalling issues with my bike,even out of warrantyI was warned by my dealer not to mention that I had one installed on my bike.He told me there was corporate service rep in their shop and a tech was working o a bike with one installed and he wrote downn the VIN and had the warranty cancelled.I look to these guys to give me good service with integrety and not just a line of you know what.I was only stating what I was told by a harley mechanic.