If you have the chance take a look at the GT-RS turbines. Here in Japan they are replacing the older GT series and have a higher power band. I have 2540's but I am really thinking to get the GT-RS set. Also I have had several Japanese friends with the Le Mans turbines, I rode in a R33 that had tem and the dude hit 1.6 boost. That hit the spot for seat slamin to me. The Le mNas turbines are designed for high performance and high useage. They usually go on the Japanese auctions for about $3,000. US.