just adding a little for a cleaner install on the boost gauge section. instead of taking out the rubber gromet and running the rubber vac line that way take the rubber gromet out and find a hole punch or something to put a hole in it to run the vac line through the hole. the hole should be just a little smaller so it "seals" around the vac line. this way you wont get any condensation, wind noise, or anything else you dont want in your car in. same goes for running amp wires or anything else coming from the engine bay to the cabin of the car.
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