The people i've talked to that have it said it made a good increase in the bottom and mid, but said that the top felt unchanged. I haven't seen a dyno on it but thats just what a couple people have told me.
Ok thank u for your reply.
Desert since you said you wont go above 12:5:1 Then I wont I will just get the sparks piston 12:1. The reason I was asking is because this person is trying to sell it to me for 110. with shipping and was just wondering thank you