So with all the options on the market, lets see what people are using, and who has the best prices on each. Please indicate any downfalls or problems you may have had with the bypass valve. All the bypass valves on the market aren't listed here, but these are probably the most common. Some of these are fairly new to the market but I suspect in coming years they will be common place. I used an alphabetical order so there is no preferential treatment.
Bosch Variant 108, 114, 110
Greddy Type-S
HKS Race Variant
Procharger Recirculating
Procharger Race
Vortech Race
Vortech Mondo
Vortech bv57
Other
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