What all these guys said is true, and trust me I went the ceramic coated way and these headers are not worth it. Fitment wise no problem witht he newer ones on the market now in the engine bay,but to fit right witht the intake manifold you got to grind down the flange for a more flush fit when maiting up to each other with the bottom studs and the big thick washers to hold them together, And like Mike said no gains that would be feil at all. Get a stock one and i believe some were there useing the square port manifold that flows well, Grind it down smooth it out if you wish and ceramic coat that and it will look good and last for ever..