Do I need clamps or couplers to install this?

You'll need T-bolt or hose clamps rated for your system pressure, plus couplers sized for 3.00" diameter tubing to connect this pipe to your turbo and intercooler. Not included with the pipe itself.

Can I weld this into a hard-piped system?

Aluminum can be welded, but you'll need a TIG welder and aluminum-specific filler rod. Verify your piping specs match your system's pressure rating before committing to welds.

Will this work with silicone coupler hose?

Yes. The 3.00" OD pairs with standard 3.00" silicone couplers and hose clamps. Make sure your couplers match the inside diameter of your intercooler ports and turbo outlet.