Trying to understand the true differences in the COBB maps between stage 1 and 2. stage 2 has more power advertised, is this because of the gains directly from the exhaust? What happens if you load a stage 2 map on a bone stock car? COBB says in their site that for a Stage 2 an exhaust is required... but there’s a number of threads stating the catback/muffler section offers no power gains, only the decat. So does exhaust mean you just need a decat pipe and not a full exhaust? Or does stage 2 mean you need the full exhaust including replacing the headers?

Just trying to to understand the differences between the different tunes.

 

Thanks Sam. So would a decat pipe do the trick? I like the stock noise level and don’t want it too loud. For sale of interior noise on longer drives and keeping my neighbors happy, one who has a 1 year old and a new born on the way.

 

Oh the newborn isn’t mine, neighbors I’ll reach out to you for some options. Thanks again Sam.