After Sunline made a new Sports Catalyzer they now have designed a new Straight Pipe that replaces the original catalyzer. The original exhasut system has two catalyzers, one in the front and one in the back. With this new system, the R35 only has one in the back. The results can be seen here.
They are going to test the system this weekend and the boss of Sunline reckons he can get more than 500ps with this system. The replacement is completely made out of titanium