Hi guys, I just bought a 91 3dr dx. It has the crappy 1.5 in it. I was wondering if there is any oem intake manifold that will work on the motor besides the original. Perhaps the si model intake? Although its rated at its peak hp and tq up high in the rpm range it feels like it hits a brick wall at 5k. I was just wondering if there is any intake swaps out there. Does anyone know how well this motor responds to mods? Any advices or opinions would be very appreciated!