Factory 7 exhaust

for race tuned motors the great! if your looking to just get an overall improvment then go with fmf or pro circuit
 
Never had 1 personally.. but a lot of people seem to like them... my dynoport is awesome has enough bottom to tractor around, an just screems up top like no other pipe I've had.
 
I have a Trinity pipe (made by the same company as F7), and it rips up top with plenty of usable power down low. They work especially well on heavily-modified (ported/stroked, BB, etc) engines.