Do these elbows work with stock intercooler hoses and clamps?

Yes. The 2.25-inch diameter is standard for most aftermarket turbo and supercharger piping kits. You'll use conventional T-bolt or worm-gear clamps to secure hose to the aluminum pipe sections.

Will I need to seal these connections or apply any coating before assembly?

The red anodize is factory-applied and requires no prep. Assemble dry with clamps at each joint—intercooler piping doesn't need sealant since boost pressure is contained by the hose clamps themselves.

Can I cut or modify these elbows to fit my engine bay?

Aluminum cuts easily with a bandsaw or angle grinder. If you're trimming length, deburr the ends to prevent hose damage. Pre-bent angles are rigid—cutting or re-bending requires a mandrel bender.