Guy Most have fitted BELLMOUTH DUMP,it`s best on Stock setup,
Best back for $$ is Dump & cat back ,as you again Power across range,
i went from 300/350 to 400/450 per tank,60 odd litres,
that was only full system, NO FUEL PUMP needed,
i still run stock boost,
i see many on here that have NISTUNE,
see lots of Prices as many will say you can RUN without a Tune as it has base tune in,
i have read few shops quoting 4/5 hours DYNO TIME to tune ,
seeing other Stagea owners runnig car with out tune for a while with no harm done,
i have asked a few Shops about this
few said no its bad it needs a tune ?,
Then i have asked few Friends that tune & they said its cool,
as DYNO is to clean up few parts that need sorting out,
many on here have NISTUNE now & are happy ,
so best ask them what they have done & what they think about whats best,
Hope it helps
Cheer`s Chuckie.