Frostbite Straight Radiator Inlet Adapter Fitting -16 AN Male O-Ring to 1-3/4 in Hose Barb 410-01 24 in Wide

24 in Wide

remove casting marks and for smoothing out runners

982 in Rectangular Port

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Frostbite Straight Radiator Inlet Adapter Fitting -16 AN Male O-Ring to 1-3/4 in Hose Barb 410-01 24 in WideWhile there is no specific size to use with a particular swap, see below for general guidelines GM LS Series Engine Recommendations: 4. 8L GM LS Engine 1. 25" inlet (FB400), 1. 50" outlet (FB401) 5. 3L GM LS Engine 1. 50" inlet (FB401). 1. 50" outlet (FB401) 6. 0L GM LS Engine 1. 50" inlet (FB401), 1. 75" outlet (FB402) 6. 2L GM LS Engine 1. 50" inlet (FB401), 1. 75" outlet (FB402) 7. 0L GM LS Engine 1. 75" inlet (FB402), 1. 75" outlet (FB402) This