Do I need clamps for the hose connections?

Hoses are included but clamps are not specified in the kit. You'll need T-bolt or worm-gear clamps sized for 2.50" diameter — grab a set when you order the pipes.

Can I cut and re-bend these tubes to fit my setup?

Yes. Aluminum pipe can be bent with the right tools and cut to length, but work carefully to avoid kinks. A pipe bender and hacksaw or bandsaw are the typical approach — test-fit everything before permanently installing.

Does this kit come with end caps or plugs?

End caps and plugs are not included. You'll need to source or fabricate connection points to your intercooler inlet/outlet and turbo outlet based on your specific plumbing layout.