Borla and magnaflow are both top of the line exhaust systems. Borla is for high range power and magnalow for low to mid. Magnaflow also is the best sounding exhaust system ive heard
You can hear how the magnalow system sounds by going to www.magnaflow.com then go to the sounds link. Pick any domestic car or sport compact all the sounds are pretty much realted to the cav. The sound mostly related to it would probably be the focus sound byte. So test it out
i ordered a single cat-back exhaust system from RKSPORT awhile back and just got it about a day ago. It is a magnaflow muffler so when i get it put on i will let you all know how it works.