I have been using the Jacob's Omni Magnum for about three years, and it does as advertised.
I use thier 8mm plug wires with copper cored plugs gapped at 0.051 inches.
I tried the MDSI capacitor dis-charge unite and couldn't realise any improvement and returned it.
I can relate to the 4000 rpm feel.
It feels as if it is 5 cycling as we used to say in my younger hot rod years; getting on the CAM.
I'm using OEM coil, if you know what coil improves what is already super let us know.
Happy Trails Beep Beep from Houston!!!
Donald, El Cheapo