What happens if you cant afford the insurance on an ST and and engine swap is out of the question...

Would you just not do any mods to a Mk6 1.4 fiesta... I know you wont see much BHP increase but what about acceleration or making the car feel abit nippier or even making it sound nicer...

What Mods do you guys suggest if this was the only car that you had to work with... my car feels so inferior now...