I don't know what performance is, but be careful. I may not be the oldest member but I know A LOT about tuning 2 strokes. The thing you need to be careful of is the fact that our tiny little motors sometimes fight the added compression rather than enjoy it, and the performance goes down. I have heard it before over on the goped forum. You add compression and even if you have other mods as well, dyno tested hp often goes down. The high performance heads are best left to 2 stroke motorcycles and jetskis in my opinion. Hope that helps!