I've been thinking about getting a hi-flow cat, but I was wondering which model I should get from Magnaflow. I was thinking about the 94035 with the O2 sensor hole. Our stock exhaust has the O2 sensor in the piping after the cat, but this hi-flow cat has the sensor plugging into the cat itself. Will this one cause a CEL? I see it listed as being OBD-II EPA compliant so I was hoping it would be OK. Here's a link to the 94035.

Yep, 94035.

i have it, and no problems.

i have it, runs great



12.33 @ 111.67 mph [Oct 2009]
Dyno'd on 08/02/09 - Mustang Dyno:
327.6 WHP 333.6 WTQ [10.1 AFR]