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Interesting. Do you have experience with UDPs in terms of impact on coolant temps? Guessing a lot of the 2.5 race cars have UDPs and if coolant temps was a problem would the stock pulley be better or does it even matter? Thanks.
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It works great for cooling the race cars!!
View it this way: Race car = high RPM all the time. Stock pulley? moves the water too fast through the radiators. UDP slows the water down and gives it more time to cool.
Now? How do you think that would work for you on the street?  Too slow at idle
I use 2 different pulley sizes. One for street and one for race. 4inch and 5 inch.
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