first time I`ve posted,i have a 2003 (53 reg)wrx box standered bar a blitz cat back system, just got myself a blitz dump valve ,instruction manuel all in japanese,there`s a couple of pitures,it seems fairly straight forward ,question is,is it just a straigth swop,do i have set anything up,there`s seems to be an adjusting nut on the top of the valve.Any advise would be welcome ,thanks

 

nobody going to help a newby out

 

Straight swap mate and if it's a vent to atmosphere (noisy) dump valve then put the silver blank into the recirculation hose that attaches to the OEM recirculating dump vale.

 

thanks a lot