msd system with adjustable timing retard converts your ignition sytem into a mutiple spark discharge (three sparks per cycle insted of just one works on carb or efi with the correct hook up and tach adapter
150.00 these units sell for much much more but need the money
noticeable h/p gains depending on your mods will work on any size/make/ model engine(4 stroke of course)
off road use only
will send pics and more info if interested
