Ok and if I'm only changing it by 4 thou will that make a huge difference and what type of squish am I looking for or does that depend on the engine setup? Engine is all stock except a clean up of all the over casting and flash in the way of air flow they are 64mm stock cylinders, full FMF gnarly with PowerCore2, K&N filter with semi open lid, 260 mains. What type of squish range is good for me, I will be running 95octane pump gas or 102-103 octane when mixed with VP if I need to. HUGE THANKS FOR THE HELP BROTHER. Sent from my BBF100-2 using Tapatalk