i just ordered my world sport from www.overboost.com and im going from an N1 style exhaust. That thing was way to loud for me it sounded real good but it gets annoying sometimes. i paid $445.50 shipped to my door. Modacar and some of the other sites including JHPUSA all had over $100 shipping to the east coast nyc area and overboost was like $40 bucks thats like a no brainer but i think the overboost list price is about 5 dollars more then the other sites. Anyone kno where overboost is located? I can't wait till i get it on. Post up some b4 and afters 4 u guys out there still making decisions.