16AN Water-Neck Adapters, No Welding-No Clamps required – AutoPlumb
Derale GM Radiator Adapter Fitting Kit 13035
Amazon.com: ICT Billet 1-1/2" to 1-3/4" Inch Hose Barb Splice Coupler Repair Reducer Fitting Adapter Connector Radiator Coolant Intercooler Heat Exchanger Fluid Manufactured in the USA Aluminum AN627-28-24A : Automotive
Oil Cooler Adapter Be Cool Radiator | Be Cool Radiators
Amazon.com: ICT Billet Radiator Hose Barb Coupler with 1/8" NPT Port 1-1/4" Steam Tube Adapter for LS Swap Steam/Coolant Crossover Splice Made in the USA Billet Aluminum AN627-20X125 : Automotive
Amazon.com: ICT Billet 1-1/4" to 1-1/2" Inch Hose Barb Splice Coupler Repair Reducer Fitting Adapter Connector Radiator Coolant Intercooler Heat Exchanger Fluid Manufactured in USA Aluminum AN627-21A : Automotive