Will this tank work with my existing coolant hose connections?

Yes. Tank uses factory hose barb diameters and connection points — your existing Roush system lines connect directly without adapters.

Do I need to pre-fill this tank before installation?

You'll want to fill it slightly before mounting to eliminate air pockets once plumbed into the supercharger system. Top off after final connection and run the engine to check for leaks.

Can I reuse the cap and overflow tube from my stock tank?

Factory cap and overflow assembly transfer over — confirm they seat flush on the new tank's fill neck before final assembly.