Here is a pack of good bxs iva off files. I have been running the 650 in our trucks for years. Works great with the twins. Works fine with a single turbo also. Pulls around 40 boost with 80/1.45 non gated stage 2 turbo. Can take off the iva housings from under the valve cover and plug off the oil supply. Unplugged files. I will send you a link thru messaging. Paste the link to google and it will auto download to your downloads. Right click it and unzip it with winzip or 7zip and then its fully useable. Thanks!