i have on my 97 uk scoob a 2.5 inch cat back magnex system but just been offered a mines jasma 038 3 inch bore cat back.is this system better than mine and will it be louder?would a de cat downpipe connect to either system?please any info

 

3 inch will be louder, if you swap for it make sure you order a 3inch downpipe to meet with it

 

forgot to say that the mines cat back would cost £180.is this a good price too.thanks