Do you just want to make your car louder and don't mind performance? If so then I guess it'll be ok. If you do care about performance I think it would be better to get an exhaust system with proven gains, after all, these companies spend time and money on R&D and I guess most of us don't have the tools/time/knowledge to design an exhaust system.
edit: if its sound you're after then I guess you can try the washer mod lol
What is washer mod??
Nismo 370z Washer Mod Video