2x remotes and control module. Was part of my valved ECS exhaust, but I hard wired it, so no longer need the remote system. Worked perfectly for the 2 months I had it installed waiting for my parts to hard wire. Perfect for some sort of custom project. 10$ plus shipping.
Those should be the long bolts holding the manifold in place. If you put in a different bolt, all you did was mangle the manifold side. The threads in the block should be fine for the original bolts. If you stripped the threads in the block, you can get bolts that are 5 mm longer. There’s...
there’s posts describing exactly what you say. 2 adjustable spacers using different size openings.
https://www.emdauto.com/products/oxygen-sensor-o2-spacer-with-adjustable-inserts?variant=42569634316547
Can find them even cheaper from China.
Goddamn that’s a lot of codes. I’d clear them all, go for a ride and see what returns. I know multiple codes across various modules can also be caused by a dying battery, so check that.
Check the BOV itself to see if there’s a hose coming off it and trace it to where up taps in. Don’t think you’d need anything else besides the GFB and a stock DV.