3 inch hose clamps are supposed to be for 3 inch hoses. These do NOT fit around the 3 inch flex pipe I bought for my intake. You will need to buy 1/2 inch larger then what you need it for. If you need it for 3 inch pipe or hoses you need to buy 3 1/2 inch clamps. This is not the normal way of buying hose clamps.
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