Anyone ever encounter major loss of performance after installation of Catback system? Installed Dynomax catback on my 09 Jeep wrangler 3.8 and lost a lot of low end performance. In stock mode with Superchips on 87 octane Jeep would jump from start. Now runs like a dog.
Hi & welcome to the forums!
Your ECU may need to readjust to the lack of cat, I've just done the same on my car & it took about 40 or 50 miles of spirited driving before the ECU was happy again.
CatBack Performance Issue 
Linear Mode
