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After setting a new baseline for PVT at 614 hp and 625 lb-ft of torque, it was time to start with the parts. VMP's GT500 throttle body requires swapping the electronics from your stock throttle body over to the larger VMP unit. Getting the throttle spring installed means putting it in just the right position to ensure proper preload, so be sure to give the instructions a good read before you get started. VMP does include a tool to properly install the spring. If you don't want to swap your stock stuff, VMP will soon offer a complete throttle body for $599.