I have a "wrong" converter for my W8.... but works with my iron head 360. I have an absolutely amazing 8" that's a bit slower in et, but cuts 1.34 60's over and over and over again. Made the car extremely predictable, and last I have another 8" that will 60 better with my combo and give me those ET chasing time slips, but at the cost of inconsistent launches. I like this piece when I go to heads up challenge races. Now I just need to get a killer 904 and start over!!