mike.lentern

Are the f6 typhoon valve springs strong enough or do they need replacing? I have been told they are stronger than standard but not sure just how strong.

Just wondering if anyone knows how many 2007 Rip curl edition xr6 turbo cab chasis utes were made? Trying to figure out whether I should keep mine or sell. Have put an fpv motor in it and a heap of mods. Also can't get more than 15lbs of boost out of it without opening up the dump pipe. Should I do this and up the boost to 20 or am I just asking for trouble with stuff breaking etc??