Originally Posted by mikey1600

I was toying with the idea of running the JUN high comp pistons with my stillen supercharger build, I believe they are 12.3:1

although if you are wanting around 400rwhp or so, why not just go a VK56/LSx, either of those with basic breather mods will run that HP all day long as it'll almost be a standard setup, this is if you are going down the route of running a different ECU etc..