7.3 Powerstroke John Wood Valve Body

The 7.3 Powerstroke John Wood Valve Body, also known as a JWB, is a custom engine part made by John Wood Automotive, one of the premier E40D/4R100 builders in the country. It helps improve shift quality and does not add a lag when shifting, a feature that is extremely important for many drivers. This valve body works well with most aftermarket transmission tuning, too, so if your truck has a transmission problem, you should consider the Johnwood Accumulator Body.

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