I have searched everywhere trying to find a beafier O2 sensor or simulator for my ecotec.... anyone know where to go? went to RK Sport and they had nothing..

Did you install a new exaust on the car? Is it throwing codes? Depending on why you are replacing the O2 sensor(s) will dictate what advice someone here can give you.

Did you install a new exaust on the car? Is it throwing codes? Depending on why you are replacing the O2 sensor(s) will dictate what advice someone here can give you.
yes I have a new header, high flow cat, performance muffler and 2.50 piping all the way back. right before i put the new exhaust on I had just replaced the o2 sensor. Now its throwing codes again

read this link:
http://www.j-body.org/forums/read.php?f=2&i=309456&t=309456&start=25


it will tell you everything you need to know about making your own o2 simulator

photos
http://img.photobucket.com/albums/v174/silent_assailant_t/TXS004c.jpg
http://img.photobucket.com/albums/v174/silent_assailant_t/Help003b.jpg
http://img.photobucket.com/albums/v174/silent_assailant_t/Help001b.jpg

read this link:
http://www.j-body.org/forums/read.php?f=2&i=309456&t=309456&start=25


it will tell you everything you need to know about making your own o2 simulator
AWSOME!!!!! thanks so much.. but the only question is will I need to replace my old o2 sensor?

I am going to say no. But, anythings possible. Your going to the parts store pick one up just in case. U can always take it back.