Hi Hermit ,

I do not have a before reading as the barrels needed to be machined .
I bought my barrels from a local breaker .

I am running a PGM II , the local race guys here open the box and join 2 things together and install a switch . All i know is that it made the graph smoother and more hp . He said it alters the powervale opning . I assume it alters the timing too . I will check my plugs at the track next weekend .

I can take a photo if you would like .