HP6217
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This kit is used to control converter charge pressure in order to loosen the converter when needed. The single internal dump valve will typically raise stall speed by 400-800 RPM. This dump valves can either by controlled by the Hughes controller linked below, or many popular aftermarket ECU's.
https://squirreltuned.com/products/hughes-performance-dump-valve-controller
*Free shipping within the USA. Please contact me for out of country orders at squirreltuned@gmail.com.
Here is a great video with some more information on this product: