I'd like to have a spare one too, just to disect and play with. My friend pulled the spray bar out of my engine, and for the slot to be aimed straight down the throat, the inlet nipple has to be pointed straight back. Everything I have read said point it at the rear mounting hole. lol Thats weird... Hey, mine idled great with the exh 1/2 plugged, and it was set way to rich for the back pressure at that time. I can't wait to see how it runs tuned properly with the one exhaust tube closed off. Im concerned about oil collecting in the tube though, I may make a tiny drain hole for it... Ha ! put an adjustable valve in there and have a tuneable exhaust ! lol