Originally Posted by Rom3n
If you are running a full catless exhaust system you should benefit from a proper custom tune.
Would you say that if you are running a full catless, you should have a custom tune to be safe? In other words, will the stock engine management keep things "safe" from an AFR standpoint with a full catless setup? What about other setups that have high flow cats?
I noticed that most of the downpipe-back exhaust manufacturers don't post AFR graphs, which is why I ask. There's also a lot of unsubstantiated claims about hiccups at certain RPMs with certain setups, loss of low end torque, etc.
Glad you decided to chime in!