Will this bolt straight into my CX-7 without modification?

Yes. This radiator mounts at the factory attachment points and uses the stock upper and lower hose connections—no drilling, fabrication, or adapter fittings required.

Do I need to drain the entire cooling system to install this?

You'll want to drain the coolant before removal and refill after installation. Refer to your service manual for the correct coolant type and fill procedure for your model year.

Is this the same as the radiator that came on my vehicle?

This is OEM-spec, meaning it matches the thermal capacity and design of the factory original. If your vehicle has any aftermarket cooling upgrades or performance modifications, verify fitment before purchase.