I'm not sure either, I've never put aftermarket header and dp on either but probably about 5-10 whp and wtq gain could be expected? It allows air to flow more freely
but if you plan on gettign the turbokit when it comes out theres no point in getting an aftermarket header and dp because the kit will have an exhaust mani that hooks up to the turbine and a dp
along with new injectors and probably a complete turboback exhaust minus the muffler lol
and engine management
and of course intercooler piping and all that
point being, if you plan on getting the turbo kit in the foreseeable future, dont get the aforementioned parts because you will be replacing them when you get the kit
but if you plan on gettign the turbokit when it comes out theres no point in getting an aftermarket header and dp because the kit will have an exhaust mani that hooks up to the turbine and a dp
along with new injectors and probably a complete turboback exhaust minus the muffler lol
and engine management
and of course intercooler piping and all that
point being, if you plan on getting the turbo kit in the foreseeable future, dont get the aforementioned parts because you will be replacing them when you get the kit