hi i have a 372r on my integra i was thinking of changing to something else since this is an older turbo older technolgy would i seen a difference in lets say getting a new borg 67mm was thinking since its newer technology it would more more efficent or am i not gonna see much more diffence between my 372 i nknow some people may say im going backwards from a 72mm to a 67mm just trying to see if its worth it to change

 

For what it's worth there is a dyno graph on full-race website under the bw s400sx 67mm that compares it to the s471 on the same engine..
http://www.full-race.com/store/turbo...sx3-turbo.html
Gives u a rough idea