The SFR intake manifold is hand crafted in the USA out of 5052 and 6061 aluminum.All of our flanges are CNC'd for accuracy. Each intake is TIG welded with 4043 filler rod. Each intake manifold is assembled to our exacting standards so you can be assured of perfect fitment, quality and finish.Some of the other benefits you get with the SFR intake manifold are: Retains the use of all stock components (idle air control, MAT, etc….), and comes with all factory fittings for direct bolt-on installation. Our intake manifold will flow as much air as any big valve head will allow. Along with these benefits, you also have the benefit of increasing top-end horsepower. What this means to you is a more usable powerband.The SFR intake manifold can be used with aftermarket strut braces.