I currently have mac mid length headers and a mac y-pipe, but i dont have cat-back exhaust yet. My hooker quad tip exhaust is on a three week back order through LS1speed.com!!! I have to drive my car a few times coming up this week, and i was wondering if not having a cat back would screw up anything in my car. The o2's are unplugged right now, i am just running open loop. What was happening while i had the o2's hooked up without the catback, during overlap air was getting to my o2s and causing her to run really lean, so i just unplugged them for now and she runs like a champ. I know LT1's like back pressure, and i have no intention of going out and racing and asking 100% out of my car, i just need to drive it to work a few times and i want to make sure that everything will go allright.

thanks,
trav

 

You'll be fine. You have less backpressure now even with the stock cat back. Your car will resopnd better to the new cat back.

 

I will be fine, you just want get the full potential of the headers without a good flowing exhaust. What do you mean your just running open loop? When the car gets to a certain temp. it automatically goes to closed loop.

 

my o2's are unplugged right now, they were getting all screwed up from not having a cat-back. By the way, my rear o2's were deleted in a tune from pcmforless.com, all i have now are my two front o2's. My car is annoyingly loud right now, i dont want to drive it without a cat back, but like i said it's on back order and i gots to get to work. For running in open loop, she gets up and goes like a bandit!! It makes me feel better knowing that i am not hurting my baby after putting all this time and money into her.

trav