Ive got a 2002 Golf 150bhp with the aum engine. As standard it wasnt great, infact it was slow. Ive since had it mapped and a non resonated stainless exhaust. Its about 210+bhp
Goes well, my mates 51 plate civic type R isnt as quick, and another mate has a 55 plate scooby 2.5 (227bhp I believe) and I can just creep past him. Its not a weapon but like I say mapping them makes a HUGE difference!

About the exhausts, Id get non res, mine isnt loud, and a lad I know had a resonated one and it sounded like standard.