This is a flange that we ordered from MAPerformance. This flange is for 4G63 head. A couple of interesting features make this flange stand out from the competition. First it has grooves to center the manifold runners over the exhaust ports. It also has CNC transitions to match the oval ports to the 1.5″ round runners we have chosen. This flange is usually used with their full Evo 8-9 manifold, but because this 4G is going into an IS300 sideways, we will have to fabricate our own manifold.
