Very nice product and pretty easy to install with the motor out :) As far as how they feel, well we put them in a car with JWT-530 BB turbos. There was almost no lag from a roll in 3rd gear at ~2700rpm and the car we were working on had high flow cats on it. My only complaint is that it did not come with new studs for the turbos. We had to hunt some down which was not that easy. Greg if you read this PLEASE start including 8 new studs with the manifolds.