Just out of curiosity.. does anyone know what the demon bolts are torqued at from the factory?

I'm installing test pipes they didn't come with any hardware. Anybody know what nuts belts and washes I need? Like what length, width and grade?

Your test pipes will need the Y pipe gasket and the exhaust collector gasket, as well as nuts and bolts. What brand are your test pipes? I'm guessing you did a private buy because if you paid retail (i.e. bought new) for TPs without hardware, you were ripped off.

Stock cats are known to be insane to remove. If you have an open faced ratchet, you might find better results. I remember reading Bonnani's DIY and seeing him snake some ridiculous frankentool through the engine bay to break one of the bolts. They're probably torqued to a spec of "innumerable hellfires" pounds per foot. The fact that they're constantly heated and cooled, as well as exposed to dirt, water, moisture, salts, (road salts during the winter if you're unlucky), plus general wear and tear means they're probably in excess of 500 pounds per foot once they've completely rusted over to the point where the nut and bolt have become one with the cat and gasket. From the factory? It's probably a spec of maybe 30, although impact guns used with negligence means more like 60.

I'd probably just soak the bolts in a good amount of penetrant and let it sit for an hour or so. Just remember to let the car cool, and also to not start up the car afterwards.

Megan Racing bought 'em new for $168. I was surprised they didn't come with any hardware since the 100 dollar test pipes do. I just went bought header gasket material. I'm wondering where the test pipe meets the stock header are those bolts or studs?

Should be bolts.

2 bolts 1 stud.

When installing aftermarket parts, it's nuts and bolts for the top and bottom.