That'd be pneumatic.
And you're going to have a hell of a time reaching any of the studs with the engine in the car with it.
For my exhaust I just bought a Borla muffler and had a local shop make and hang the pipe and weld the muffler on. I think I spent $200 on the muffler and about $300 on the piping and welding.
I've been running a Koyo Aluminum racing rad for a 1JZ. You have to make a couple braces out of some aluminum stock and trim the lower bushings by a bit, but it's probably the least expensive option out there if you shop around and it works very well.