Hi all, I've had some questions here and there recently about the AFM upgrade that I recently did, so here is a little run through for ya. First off, I went with this upgrade because it increases the diameter of the intake. I have a 22rte with a performance head and exhaust system (see Betsy) and I wanted to allow more air into my engine. I don't know if this will work for you, but I had fun with it, and I do believe that it has improved performance. These are the AFMs next to each other with their dimensions Front: Back: If you manage to get an AFM that is from a later year than an '82 5m, the internal circuitry will be different. I ended up with one that was not an 82. Easy enough, you can just swap out the internals and everything jives! For the piping, I just kind of pieced it together. From the AFM down, it is a 3" to 2.5" silicone reducer with a 45 degree angle, a 2.5" metal intake pipe with a 45 degree bend, and a 2.5" 90 degree silicone elbow. The metal 2.5" pipe is the most constrictive point on the system, so I gave ya a little maths showing how much bigger the new intake is compared to stock. The stock pipe has an intake port for the front vent on the valve cover. My system doesn't, so I was recommended to tap the bottom of the AFM for a port behind the vane to hose to. for now, it just have a vent filter on the hose coming out of the valve cover. One great thing with this upgrade is that the 5m AFM has an adapter for a cone style filter. I'm running the cone filter for now, but it sounds obnoxious, so I'm trying to modify the stock air box to allow more air though and mount to the 5m AFM. Thats my story, cheers!