Originally Posted by BobaFettm
http://www.eisenhaus.com/ shows 6.4% gain... which would be around there... so i can see that doc may be 100% correct!
and for god sakes I hope so!!! haha
Your compairing apples to oragnes. That is for a full catback. We have no idea if they kept the same size pipe, added a resonator or what the design of their muffler is vs. a magnaflow.