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the gear vendors is great if your only concern is lowering rpms. the problem with the gear vendors is the parasitic drag on the engine eating horsepower and i have seen a lot of times zero mileage improvement. 4wd big block with big tires rarely equals gas mileage in any case. your moving a ton of weight with a bunch of wind resistance. getting down to 2100 rpms could actually have negative affects on mileage depending on the engine combo and the cams cruise rpm
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Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.
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