Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2006 Malibu (V6) Exhaust Restriction › Reply To: 2006 Malibu (V6) Exhaust Restriction April 30, 2021 at 6:32 pm #990327 Richard KirshyParticipant Much tougher to clog any muffler than a cat. Sounds like you may have a partially clogged cat. Depending on how your ECM is programmed todetermines an actual fault