There is already mate, had them on for about 700 miles now. Don't know what to power figure is. Major improvement on low down torque as well. Cheers! Still need to start wire tucking and really tidying up the bay. Here's a quick video of 0-100mph. >http://www.youtube.com/watch?v=HkrjoF0bU_w&feature=youtu.be
4e-fe corolla has a 4-2-1 manifold, should be able to pick on up from the scrappers for £50 or so. Its the bug eye corolla your looking for. 5e-fhe has a 4-2-1 also, different shape to the corolla one, but a lot rarer.