Its smog season and I had a quick question about our cats on our cars. My car currently has a helix up/downpipe and a cobb catback exhaust on it. I know I won't pass with current set up but was wondering if I had to replace all 3 items to pass?

Could I pass by replacing back my stock uppipe and downpipe and leave the cobb exhaust on? How many of the three do I need to pass? Was wondering if any folks had experience on this matter.

 

you will need the up-pipe and downpipe to pass.

 

you dont need the uppipe, just make sure your car is fully warmed up and youll be fine..replace the dp though

 

you don't need an uppipe to pass smog, just put on the stock down pipe and you will pass just fine. You should also be ok with the Cobb catback

 

passed smog a month ago just by putting my stock down pipe back on

 

Like everyone else has said, you can leave the Up pipe on, put the stock Downpipe on and you should be good to go.

I passed smog like this 5 months ago in Dec.

 

+1 friend of mine smoged his the same way, passed with no issues