What hp difference am i lookn at

[toolucky]

I have a 421 cheetah pv motor that has the Trinity stage 4 inframe pipes on it. When i purchased the bike i got a dyno sheet that said the it had about 80 hp, i purchased a set of Sheerer out of frame drag pipes for it and i was wondering what kind of hp gain am i looking at?

[lowbuckracing]

between 2-6 hp