i have a 2004 pontiac grand prix gt1 and well it started messing up on my like when i would speed up in the freeway it would kind of jerk a little bit like it would feel like the car was strougling to go faster and i was only going lik 70 and when i would speed up it would not speed up at all like it my engine was refft up and i would press on it more i could feel the car like pull me back as if im hitting the breakes, they told me that it was catalytic converter was messt up so i wanted to buy another one but i want to put a performance one. i have a cuople of web site at the bottom i just need a suggestion on witch one would be good for my car. and also if ya have websites were is cheaper or better that would be good too, or anysuggestions on wat is really wrong with my car that would be nice too, help me out plz i would really apprciate that alot, thank you, and no bull answer real answer.
http://www.pfyc.com/pc/WB5004/04EXH/Off+Road+Pipe+-+3.8L+V6+Engines.html
http://www.zzperformance.com/grand_prix/products1.php?id=551&catid=110
http://www.pfyc.com/pc/WB5004/04EXH/Off+Road+Pipe+-+3.8L+V6+Engines.html
http://www.zzperformance.com/grand_prix/products1.php?id=551&catid=110