Also, Amazon says the adaptor is 1.5" but it is smaller than that. They call this one 38mm. I tried the 36mm version and returned it because it was too small. Below you can see that this one fits into Gates Green Stripe 1 3/8" straight hose. I will be shortening the long tubes on the car to get this in place. This adapter has a slightly larger ID (inside diameter) than the long aluminum tubes that I use on the bottom of the car.
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