Choosing a bypass valve for your twincharged application

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The results of our analysis leads us to three different types of possible bypass valves:

1- The Sound Performance Boost Activated exhaust cutout  ( or a similar custom unit using a Wastegate Actuator and a spare throttle body)

2- The HKS Twinchamber Racing Bypass Valve, or the Greddy Type-S BOV

3- A 60mm external wastegate with a large enough ID for good intake airflow

Illustrations:

Home made butterfly bypass valve

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