Re: "GM Performance" Optispark? |
Subject: Re: "GM Performance" Optispark? by biggrizzly on 2009/10/25 0:10:39 I also replaced my Opti with a MSD unit about 7,000 miles ago and so far... so good. I don't know if it gave any performance increase but I'm hopeful that it will last the remaining life of the car, or at least until I do something different with it. |