Hello, I am thinking of getting the milltek race header with test pipe and no cat. Wondering if anyone has these and how do they perform? How bad is the smell with the windows open? Any torque loss or gain?

I want to go with some kind of street cam for mid and top end power to go with the headers, 550cc injectors and tune. So far I have alta intake, 17% pulley, 0% crank pulley, Invidia exhaust. I don't track the car but drive it pretty hard on the streets and I love to rev it. I am looking to gain more mid and especially top end pull.

Anyone with a good setup please chime in. Thanks