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What size radiator hoses does an LS use?
Per ICT Billet: factory lower hose is 1-1/2 in on all LS engines; upper hose connection on all LS water pumps is 1-3/8 in.
Related questions
- Which way does an LS water pump turn?
- Will any LS water pump fit a VVT engine?
- How do I tell which LS accessory drive spacing I have?
Sources
- LS Cooling & Water Pump swap guide — ICT Billet