I've always run MSD products in the past and all I can say is great things about them. Saying that, my current car had Jacobs products on it when I bought it. They seem to be excellent quality and I have been very pleased with my setup so far. As far as prices go, someone set Jacobs products were alot more expensive. If thats the case, I would buy MSD.
I can't help on the Holley products, don't know anyone thats ever used their stuff.
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91 single turbo vert
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