Blow off valve (2003 protege speed)
 

Hey yall, ok got two questions I have a 2003 Mazda protege speed comes stock with turbo 6 pounds of boost n its manual first question is it has a recirculating blow off valve n I'd really like to swap it for an external bov will it hurt the car? N seconed I was wondering if I should install an oil catch can, oh n one more thing out of curiosity I have to keep my rpms at about 2300 when starting in first is this normal?