that sounds weird to me though... my car seems to pick up quite a bit from 6000 to 7000rpm... i also have a GT30R... doesnt really die much anywhere, just down low around 2000rpm, thats prob just coz of air fuel ratios down low.... but if others are having the same probs then i guess its a normal thing, jono how much of a difference is there in power loss up top? is it noticable or does it just stop making power after 6000rpm?
i agree with MattSR check out ur cat..