I've had the car for a little over a year and I have really bad Ignition break up sometimes when I'm spooling up. I've changed the spark plugs to NGK heat range 11s, cleared it up for the first take off but after that it went back to normal. Then order NGK heat range 9's and it cleared it up for a couple months, only drive the car every other weekend. Now I'm beginning to think I need an HKS Twin Power to help out so I don't have to keep replacing spark plugs every other drive, Or if the HKS Twin Power won't help out all, I guess thats what I'll have to do.