Hey so the other day i installed isr high flow cats and it is causing my car to stutter and jerk at 3k rpm under 60-100% throttle can anybody help me find the issue?

 

is throwing any codes? blinking cel? super hard to give you any pointers with that kind of description. post a video if you can - that would probably be best.

 

here is the video

 

that vid is only 1 second long lol kinda sounds like you're on a 2-step while already moving.

 

High flow cat is not a Plug-N-Play mod in these cars, you'll need a tune to change the maps and O2 sensor reading values as the stock maps are now going crazy like a gypsy around his empty campsite..
Here, contact Seymore4

 

I needed ordering the remote tune from admin will he fix my problem?

 

rear narrow bands should have nothing to do with fueling, so i highly doubt he needs any kind of tune to fix this issue. OP, are you sure you didn't forget to hook something up? are you getting a check engine light?

 

[QUOTE=99zx2turd;7225889]rear narrow bands should have nothing to do with fueling, so i highly doubt he needs any kind of tune to fix this issue. OP, are you sure you didn't forget to hook something up? are you getting a check engine light?[/QUOTE
No check engine light car runs fine at like 0-30 mph then start stuttering