I saw 19kW quoted for cat-back and air cleaner, in a nationally published magazine. Does that mean it is even better??
I think L&L is right on the money for hoisting that flag.
I have published dyno charts showing how you can get ~8HP gain just by letting your powertrain get really nice and hot!
BTW - This reminds me of something I read in the article on the RotarMaster turbo prototype. See this thread/post http://www.rx8club.com/showthread.ph...759#post408759