I have an '06 SS/SC with Stage 2 and Injen CAI and I'm interested in getting a full exhaust system next. I'm very interested in the ZZP Header + DP combo and GMPP Touring Catback. I'm looking for a very low and mellow tone (close to stock) with no rasp. I was wondering will the ZZP downpipe bolt up to the GMMP Touring Catback or will I have to go with a different setup? I know the ZZP downpipe is 2.5" but I'm not sure if it will bolt up to the GMPP Touring catback because I think it is 2.25" piping all the way through. Also does anyone know the stock downpipe size?

 

It will bolt right up.

 

It will work. Correct me if I am wrong, but I think the Vibrant H/DP setup will work, as well (if you are looking into more options)

 

Yah vibrant's header & DP will work also, the closest thing your going to get to stock would probably be the GMMP touring exhaust. When I start my car up its similar to stock but once you give it gas its pretty loud. Also I think CTI makes an awesome header & DP. i have a 3" collector and at the end of the DP I have a 2.5" neckdown for the corsa. Its all in personal preference.