Do I need to flush my cooling system before installing this radiator?

Yes—drain the old coolant completely and flush the block and hoses with distilled water to remove sediment and debris. Dirt in your system will clog the new core immediately.

Are the transmission cooler lines the same diameter as the factory originals?

This radiator matches factory specifications, so your existing trans cooler lines bolt up directly. No adapters or modifications needed on the cooling lines.

What if I need to return this if it doesn't fit?

Test-fit before you drain your old system. Make sure the mounting brackets align and hose connections reach without strain. Once coolant is filled, any damage from a bad fit is on you—so verify the fit dry first.