I just installed my EPS Big Bore TB's and Z1 intakes and I gotta say that there is a noticeable difference with the butt dyno, maybe 15- 20hp with out a tune. The throttle response is snappy down low and I feel the power through the whole power range. My tuning software should be coming in the mail soon so I'm sure there is more on the table.
When I turbo my car down the road I will switch to a 3" intake and do something different with the upper and lower intake.... Never ending fun. lol
All-in-all, I'm happy.
I had to use a 3" to 2.5" Samco coupler to mate the TB and CAI. The size difference is comical (and makes me sad there is a new restriction).