If you want to be safe, either buy meth and mix your own, or buy an established product.
http://www.snowperformance.net/product.php?pk=3
Alot of people buy this by the case and keep it in the garage.
DV = Diverter Valve.
Name given to the stock recirculating pressure bypass valve.
Looks like a Bosch valve used on the German side of the house as well. :masturboy: