I would hardly say there is a power loss, maybe only ever so slightly.
Definitely makes the engine quiter (thats what it was designed for) and it would also keep the filter cleaner/easier to clean. Not guaranteeing it keeps 100% power on the engine, but the loss would be minimal IMO.
Car-less (Velox V10 or 733) // RB T10.5"+" (JB Modified) // Bluebird BMS-990DMG (St) & BMS-631 (T/B) // ATS 16% // Capricorn Wheels // Protoform
"70% of the time, it works ALL the time"