Had the big mouth two weeks before intercooler. They helped drop intake temps by a few degrees. Most notably when cruising at highway speeds where youāre not really on the gas (normally you would see a rise in temp) not so much with them. Pair them with the intercooler and my intake temps are just above ambient air tempWould love to see someone do someone actual real world testing so people can stop arguing over what they believe is better. The only benefit from this would be slightly cooler temps at the intake, but the real intake air still has to pass thru the intercooler, so likely irrelevant. Possibly more air density, but the little turbo can only suck in so much air. So mainly just for looks, but also blocks a good size area of the radiator. If you have $150 to blow, go for it, but I wouldn't really expect any benefits from it.
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