Well, I think Jacobs claims a performance boost on a stock car. And I've read in this forum, that an MSD doesn't really do much for an otherwise stock car. I know the Jacobs stuff is way pricey. I'd probably just get the MSD, unless I was making extreme power, and playing with more $.Josh_042 said:Does anyone have an opinion on or have used Jacob's ignitions systems. Compared to MSD.