I think it really depends on the car and heres why. My Dad has an 01' C5 and the shop where I bought my Magnaflow told me the cat-back for his car is about $700.00 (Borla) but get this, the Magnaflow system is $1200+, I don't get that at all. I really want him to get the Magnaflow, but money rules the world and I don't think I can justify the extra $500.00 to him, especially after we heard a Borla system and that one even had a resonater on it and it still sounded good!