Yes I am, the headers that came on the car were trash and I don’t like headers on the street for the heat, noise and leaking reasons. Yeah, the manifolds did take some power away since this engine isn't a stock setup but my car is a daily driver, not a racer. I am running those old school functional vented louvers on the hood, I think they allow more air to flow though the engine compartment. You can't pull air through the radiator is it can't exit the engine compartment easily.