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Improving 60-foot times at the drag strip can be a major challenge, especially if you are still running a stock 4L60E transmission. A foot-braking technique can only give you a minor improvement in starting line launches and can be tricky at best. With the new TCI® 4L60E Transbrake Valve Body you get the hard launching benefits of a Pro Tree transbrake system, while maintaining the fully automatic functions of an OE transmission. When the transbrake feature is activated you can safely stage and allow the engine to rev for awesome launches! Ideal for all street/strip and race vehicles.