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So ok look at my si and see what i am running then tell me what kinda changes i will see and feel if i was to block off the wastegate tube i am just curiouse and wil it help any with fuel milage
I doubt it will help with mileage, I haven't noticed an improvement on my truck, mileage wise. I noticed it pulls a little harder throughout the RPM range, as more air can be rammed into the cylinders.