I've had both(T-5's and CPI inframes)..
It is two different hit's as said above.
The T-5's hit real hard in the middle
and pull pretty hard on the top.
CPI inframes hit a lil' softer and further up
in the rpm's,you don't realize how hard they
are pulling until you try and stop.CPI had
some quaility issues that have been solved.T-5's
are a great product as with most Toomey stuff.
The Toomeys came with everything you need
for an install.CPI,you get pipes,and buy the rest
on your own(hangers,clamp,etc).Both companies
have prooved they are there for the customer,and
keeping you with their product.
FMF is a good product as well,but in some instances
change alot,and you may not be able to get replacement
units later on.
Well,thats my opinion,of the two asked about,and for my
bike,I have to say CPI.But our bikes may be way different
as well as needs...
Dune-A-Tic