I have a catless downpipe with no tune, car went into limp mode after a pull. Read the codes and it said boost pressure was too high. I asked around and most people said it’s likely because of my downpipe. I looked it up and a lot of people report +3/4 psi overboost with a catless downpipe when not tuned. I’m not sure if it’s 100% because of the downpipe but I took my intake off, inspected everything and nothing was loose.
