Has anyone used the MSD multispark coil set on thier C6 vette? If you have is there a noticable difference?

 

I don't think you will see any change with just the coil sets. MSD (Multiple Spark Discharge) is really helpful when you are forcing more fuel and air, either with compression or forced induction, in more efficeintly burning extra fuel. Spark plugs fire multiple times on each compression stroke. So, in short, don't think it will help noticeably unless you do some more mods to the engine. [8D]

 

And you will find it necessary to re-program the ECM to maximize any advantage it would give you, which, on a stock engine, would not be worth the expense.