I have a Astra Mk3 Turbo and i am currently looking at tuning the engine. i have spoken to several tuners i.e Regal, courtney, Top Boss performance who have all told me different things - which is very confusing. some talk about using cossie managment and big intercoolers others using chips and charge coolers. please help as to which route to pursue.
ps/ i was thinking of about 300 + bhp.