havent done it on a turbo but yes it does help. Its been a few years ago but I think it was Hartman that had the springs. 3 or 4 different rates depedning on what elivation you ride at. Eric
I've been looking into this for my T-rx1. It sounds like Hurricane makes the best springs for turbos and I am going to order some for my sled. Here is the website http://www.hurricaneperformance.ca/