I am in the process of installing the moroso oil pan on my B18c1. It is hitting on the windage tray (the plate covering the rods and crank) and the nuts holding it. My question is, is the windage tray require removal when installing the moroso oil pan? I remove a couple of bolts (to clear the moroso oil pan flanges) and the tray is held by 4 bolt. It is still not clearing it completely. I had 2-3 mm gap before removal of the bolts. But if I remove the windage tray completely, the pan would sit flush with the engine.

you wiggle the pan and slide it in, no windage tray removal is needed. If it still go in, you got the wrong pan for the wrong car.

well unless summit racing and moroso label their pan incorrectly. I got the #20901 and it was listed like that on the box that it came in.

did you try to wiggle it in? got to put a little strength to it to make it fit. The reason it won't just slide in because the pan have custom flap door section on the bottom of the pan and the shape is alittle different.