I have the Mac's on my car and I have but two somewhat small complaints. One, they rust really easy but rust is to be expected with anything that isn't stainless steel. Two, you have to pull the passengers side header to be able to drop the transmission out of the car but thats the same as all other header brands with Hooker headers being the only exception. Other than that, I like my Mac headers and they definately fit good, sound good, and give acceptional power.