Has anyone ever used one of these? http://www.yellr.com/

Does anyone know if they'll even work for our cars?

What methods are y'all using to correct your speedometers? Any other products?

Thanks in advance.

 

Anyone?

 

http://www.jpcycles.com/product/560-...FQ7xOgodNDEA7A

used that one of a few bikes...

i always love the obd2 stuff with support, just plug a hypertech unit in and tell it what you've got...easy as can be.

the one you mentioned looks pretty simple and as long as it works reliably then i wouln't worry about it much.

 

Do we have hall effect speed sensors?