Has anyone ever put a Magna Flow universal high flow cat on a 1999 cherokee 4.0. Cause the muffler shop will not put it on because it does not have OBII certification. Will it affect the o2 sensor readings and cause the check engine light to come on?

 

i bet they have one that they will put on in stock right, go to a different shop

 

Don't believe the Magnaflow cat is Kahlifornia legal.

 

x2. Try a different brand.

 

x3 they make one that is get on the phone give them hell 49 state legal ca is not